on the contrary, i find the jcrew chinos to be just fine for my physique. i'm 5'9 and have 22in relatively muscular thighs. i tried on both the BB milano and jcrew urban slim fit. from my experience BB milano is slimmer fitting than jcrew. i didn't buy the BB because they come with creases .. a bit harder to dress down if chinos have creases imho.
i guess my point is, if you're on the skinnier side, jcrew may be too baggy. however, if you have a relatively more athletic build, i found the jcrews to be just fine. can't complain spending only $70 on some pants either :)