My personal test of this after I read it seemed to back it up - the higher the dewpoint (and thus the wetter the air), the more having, like, a fan pointed AT ME or at least at the wall behind me (and thus flowing back) seemed to make some difference. This dropped back off when it got dryer but was still hot.

Their tests also seemed to suggest that the more fans you have, even if you still need SOME AC, you can get away with LESS, as moving air "feels" cooler. And fans definitely pull less electricity than AC, so I figure there's not that many downsides to giving it a shot.