That is my understanding as well... Maybe if it was strickly a track car and under some specific cases.
However, I don't think it is a good idea. Unless you like changing head gaskets and love to spend your nights under the hood, I wouldn't do it. I just swapped heads on my coupe before putting boost in it because of this reason. This guys just sounds like an @$$, we have them in our camp too...
Did you talk to Sam? I am sure he would be able to answer this question without any problems....