Calm down. :) I never said that subversion's interface is great(?!), I just said that designers often find some tools programmers use ridiculously ugly and unnecessarily complicated. I think they have a valid point, and when programmers write them off, they often lose valuable feedback. (If a relatively simple tool is as annoying to configure as procmail, for example, somebody screwed up badly. IMHO.)

I use Mercurial, but I don't have any grand illusions about its interface being ideal. It works well enough for me, though. (I don't like svn either; tracking changes on a file-by-file basis isn't usually the right abstraction for the way I work.) DCVSs are relatively new, as somebody else pointed out, and in time they will probably have better interfaces.