"its support for Windows remains a problem point." - i'm using XP with
tortoisegit 0.5.1.0 ( 
http://code.google.com/p/tortoisegit/ ) and it
works perfectly.
Any way, I propose to vote here:
http://www.reactos.org/forum/viewtopic.php?f=2&t=6744
Zachary Gorden wrote:
  This was discussed amongst the developers.  A fair
portion objected,
 and rather strongly at that.  I happen to be one of them.  Its
 "performance" is oversold and its support for Windows remains a
 problem point.  And with the new branching features in SVN, the one
 advantage git does hold that's worth anything to us may well be
 disappearing.