1000 FPS

No, there's no special tricksiness happening here. It really is that fast.

timedemo bigass1 783 fps - although bear in mind that I haven't done playerskins yet so that can be expected to come down a little. (Update: did playerskins, 778).

Borderless windowed modes are going to have to go. This is nothing to do with personal choice - DXGI doesn't let you have them so you can't have them.