I'd imagine it also depends on the manufacturers. Nearly everyone makes a 1911 these days, and the cheaper models are most certainly not the sort you'd use in competitive shooting like a Les Baer. On the other hand, only a competitive shooter would sink a couple grand (or more) on a heavily accuratized firearm.

That said, I own both a Glock and a 1911. Both shoot well and are probably far more accurate than me. :) I tend to like the Glock a little more because of its simplicity and ease of taking it apart. That's not to say the 1911 is that much more complicated, but it can be off-putting to some. I happen to enjoy cleaning my guns. So, there's that.