I think Dr. Agatson is a bit influenced by the Mediterranian diet which includes red wine with most meals. There are a whole bunch of studies suggesting that red wine is better for you - anti-oxidants, anti cancer etc., not so much weight-wize.

I also think in general red wine is drier (except for kosher ritual wine, which is sugar water!), so another reason why he might be suggesting red over white is less sugar. One reason why I am on SBD and not Atkins is that I like to have a glass of wine - rarely two - and it is possible. I have sometimes white, but would say you should look at the sugar contents and make sure you drink dry white wine. As with all SBD carb-added things in phase 2, try it for a while, and if you stall, see what happens when you drop it. Everyone has to find out for her/himself. Cheers-Prost!