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).