The main problem with Hg is the same problem I
have with GCC,
Cygwin, etc -- it's a Linux tool built for Linux-based projects,
with a fanatic Linux-based fanbase that won't care much about
Windows support, stability and performance..
So true... I'm sick of those fanatics, though recently I see a
decrease of their count, and a fresh view on FOSS world by people
(here in Russia).