It says when you drink alchol, it quickly goes through your bloodstream and across the placenta. That makes me feel ill.
It seems the majority of advice is not to drink any alcohol during pregnancy. I guess the majority don't want to take the risk, no matter how small, just in case.
Surely just because there is no distinctive evidence now, that's not to say there won't be. Personally i am not willing to take the gamble. Although i do suspect that with some people who drink during pregnancy, you could throw loads of new evidence in their faces and they would still argue. I guess if people want to drink while pregnant, they will do so anyway regardless.