Please accept my apologies, my original response was a little OTT. The objective reasons for making the switch are:

- its a lot faster (IIRC creating a branch in subversion is the same as a copy operation) - the merging algorithm is better (this is so important IMO) - you get to commit when disconnected from the network - because it is faster and uses significantly less space, you can improve the way you segregate changes, giving you more (and improved) options when it comes to your branching strategy