I take it you subscribe to the Jkurz school of thought that you don't need to be strong to be big? :d
obviously ''powerlifting'' (whatever that means, I have no idea) isn't going to make an unaesthetic frame into a wasp waisted, tiny hipped Flex Wheeler.. but as a reality check neither is 'bodybuilding' as practiced by most denzins of your gym.
http://asp.elitefts.com/qa/default.asp?qid=56455&tid=139
http://asp.elitefts.com/qa/default.asp?qid=55157&tid=124
http://asp.elitefts.com/qa/default.asp?qid=54913&tid=126
3 quite different examples of guys who actually do some work in the gym, and diet down. They all lift heavy, the difference is in ... wait for it... their genetic response to training & their underlying structure.