According to the sitemeter OS stats for twistedmatrix.com, 43% of Twisted users are using some form of Microsoft Windows.
I don't have any such graphs for Twisted developers, but off the top of my head I would guess that 2 out of 40 developers actually use Windows for anything except games and grudgingly booting into it to fix a couple of Twisted issues per year. I am not some kind of math genius, but even I can tell that is not 43%.
So - where are you Windows/Twisted people? If you're really out there, we could use a few more dedicated maintianers that don't totally hate the platform.