Perhaps you need a different sample size (from you chess friends and colleagues)?
You seem to be missing the forest for the trees, @Dpnorman. I was talking about the USCF forest (not your individual tree).
21 posts is about 50 minutes is perhaps the "best explanation" for the latest wrinkles in this thread.
One of the endgames that got left out that is important is K+Q vs. K+P on the seventh rank. The difference between a win loss or draw depends on which file the pawn is on and how close the kings are -- as the side with only a pawn I held the draw in such a position when I was only a 1500.
Despite all the nay-sayers endgame knowledge matters. Probably a lot of the ones that are saying it doesn't matter don't realize all the points and half-points they've lost through their lack of knowledge.