I like curious topics such as this that makes one think and wonder just a little bit. Unfortunately, not being a chemist, I'm of little help in regards to the glycemic aspects of different grapes. I realize I'm going off on a somewhat different topic here but I myself have always been intrigued by how red/white wines are percieved and precisely distinguished from each other as a type (apart from the obvious visual clue - the color itself). It leaves several interesting questions. Do "red wines" have a general "taste" that is distinct from "white wines" (assuming you didnt
see that it was red)? Do "white wines" generally have a "taste/character "all their own that is distinguishable from "red wines"? If the latter is true, and if you simply added a neutral/tasteless red dye to the white wine, would you still "taste it" as being more like a white wine? Does it even make sense to think that you can talk about what "white" tastes like versus "red" if color is not present and textural qualities are virtually absent? How much an impact
does visual knowledge truly have in how we
percieve a red or white wine?
The grape skins contact (or lack of any contact) obviously determine why we
see a wine as red or white. I'm not confident myself that I can seperate the impact that color perception plays in how I generally distinguish one type from the other. In fact I would pretty much say that I really
cannot seperate it. This probably just reveals a lack of focused tasting experience on my part, I don't know. The reason I admit to being "tricked" by a wine's color lies in the fact that my very favorite wine, champagne, is at its heart a mixture of this colorless red/white mixture!
Is a champagne a red wine or a white wine? Well, it's both, technically (with the exception of blanc de blancs or blanc de noirs...). Yet I never think of champagne as a red wine. Never. And I mean even in its character (obviously it isn't a red wine visually). Quite the opposite. To me it is
always a white wine - just a white wine made into a more special, unique, & "romantic" creation (sorry, just had to let my bias take a harmless jab at all other "normal" white wines for a second - no real offense intended to all other still whites). It is always white to me, always elegant (even when it's fuller styled). Doesn't matter whether it's a Krug or Bollinger or a Taittinger Comtes de Champagne (blanc de blancs). To me they are ALL "white"!
Yet there lies my technically incorrect irony. Knowledge-wise, I know better. I know that champagnes are very much "red wines" but never do I taste or feel that way. I'm probably being Mr. Obvious here but I also find that I have trouble escaping the impact tannins play as well in distinguishing between red and white. I know, I'm very intelligent aren't I? Stay tuned next week and I'll tell you all that the difference between ice and water is that ice is hard and water is soft...
But honestly, I do find the role that tannins play in the texture to be such an obvious and overwhelming distinguishing factor that without them I pretty much dont consider any wine "red" (even if the color red could still be present without them). I suppose you could really test my perceptions and reliance on color and tannins by asking me how I feel about Rose champagnes then? Hmmm... good question. I would still NOT say they are "red" to me. Yet I acknowledge they aren't exactly as "white" as their more pure sisters either. So what are we left with here? I cant completely use the no tannins argument since I HAVE detected an ever so slight "grip" in a rose champagne before. I really dont have a good answer other than to say that perhaps I dont find roses to be as "white" as regular ones but STILL find them to be even LESS a "red taste". So I guess I'm inclined to say even Roses are "white" to me (and that is with visual AND a slight textural proof to the contrary!) I think the bottom line may be that unless I'm tasting a big chalky Beringer Private Reserve, I'm NOT ever going to think it tastes "red". So I wonder how "blinded" I truly am by tannins when tasting just the juice of a red grape. Can I really tell the Pinot Noir/Meunier character/taste from the chardonnay in a typical champagne blend? Sometimes I kind of think I can. Others times I really don't think so. While curious, I usually don't even try. I just enjoy the taste/character as a seamless whole (as is intended). Furthermore, if and when I can tell those differences do the Pinot characteristics actually seem "red" to me? I would have to say no, they really don't. Am I just that big a slave to the lack of any visual red color or textural tannins? Yes I think I must be! Does it really matter? No not really. I will still go on believing champagne is the most enjoyable
white wine in the world. And, technically, I will still go on always being incorrect but these are fun things to ponder...
Sorry if this isn't exactly what this topic was about but reading the title it sent me off into thinking about all this...
Jeff