Since the thread is becoming long and has many forks (making it difficult to follow) I made a wiki page where I tried to summarize what was said here: http://wiki.inkscape.org/wiki/index.php/Change_VCS It would benefit from review by other people who have followed the thread. In particular adding a proper speed comparison with Inkscape tree in all systems would probably be valuable. Then updating stuff on this page together with emails on the list would make the current status of the discussion easier to follow. I also added a DVCS vs SVN section, which is to be expanded (I just did not felt courageous enough to dig inside the email archive and exhume the old threads on the subject). For people thinking it is still a concern, please add your opinion there.
JiHO --- http://jo.irisson.free.fr/