my opinion of him after having read loads of his stuff is he's the bees knees, so I believe him.
Faith can be misplaced. I have a generally very high opinion of guys like Christian Thibaudeau, for example. A lot of his stuff makes complete sense, and I want to place my faith in him. But then I come across pseudoscientific crap he's published like how to do a reverse squat with a lat pulldown to hit the hamstrings, and I realize he can make mistakes.
The same should be possible with Bret Contreras. We shouldn't put blind faith in stuff they say, controversial things must be tested even if they come from trusted sources. All him supporting lower abs means is that his arguments for it are worth considering, not that we should accept a claim without arguments.
Also anecdotally (I know, I know, anecdotal evidence means nothing...) I know that certain exercises I have done in the past have emphasised the lower portion of my abs. In fact, I am 100% sure I can target the top, middle and bottom sections of my abs.
I agree, anecdotal evidence means nothing.
Also, considering the guy makes his living off this sort of thing, I don't think it's unreasonable for him to want to get folk to buy his ebooks. We've all got bills to pay, and he gives away loads of what I consider good info for free on his website and on t-nation anyways. (I'm a little worried now that Ironman's going to rip me apart...)
While I agree with this, 'the evidence is somewhere you must pay for' shouldn't make us assume that the illegible evidence is legitimate.