The Jetbrains IDEs actually have excellent Git integration if that suits your purposes, which basically means Java (as many PHP, Python and Ruby programmers are married to simple text editors, emacs, vi, etc).

Now I like git but I can totally see why people don't use it (or in fact any DVCS). The central repository model is easily understood and implemented. The idea that there is no central "source of truth" is confusing--possibly even alarming--to an outsider.

Windows support problems for Git go beyond having no TortoiseSVN equivalent though. When I was setting this up I at first tried to get Git over SSH working with PuTTY and it a hair-pulling out experience. I eventually abandoned that effort in favour of Cygwin, which just worked.