I hope Grumpyvette will chime in here, but I believe that most racers would rather use the two bolt block and put splayed caps on it.
Barring that, they'd rather just have the 2 bolt instead of the 4 bolt. Something about the webbing being stronger that the splayed caps don't compromise I think....?
I can't remember where I picked this up, I've always been a 351C/429/460 Ford Fan myself.
I will have to say this one rides the fence on which forum - someone interested in a 400 block would surely like to hear about it, but it is indeed relatively rare nowadays to find one. If it hasn't been OB'd it would be a find - 4 bolts or not!
I say give him the benefit of the doubt Flash...