There's still plenty of high profile FLOSS projects using SVN, and even CVS (!!). Gnome, KDE,
inkscape, gimp, blender use SVN, openoffice.org uses CVS. Much of the toolchain (whose
developers, if anything, should be the "alpha" geeks running headfirst into git, right?) use
CVS (autotools, GDB, glibc, binutils) or SVN (GCC). Emacs is apparently converting from CVS to
bzr.
Given how widespread CVS still is years after SVN has been stable (and that is pretty close to
a no-op upgrade for users), I don't hold much hope for any rapid migration to DVCS:es. Which
is a bit sad, since IMHO mercurial and git are really good (I don't have experience with
others so I'll refrain from commenting on them), but there's not much one can do about it.