Oh, whoops, I must have missed it on your page on first reat. I've been meaning to track that down and re-read it, thanks

It's true that allele-behavior interaction studies have really small effect sizes. Although, I do think that if someone has done the relevant genetic testing, it might be worth looking at the better studied dopamine alleles (DRD4 VNTR /DRD2 taq / DAT1 VNTR /COMT 158, etc) when deciding whether or not to take stimulants, since both extremes of the spectrum have somewhat similar cognitive disadvantages and they can be difficult to distinguish behaviorally.