I was pretty disappointed when I installed the Windows kiln client just now and it dumped me into an unintuitive (customized?) TortioseHg Workbench GUI without any sort of direction of where to start. The link of the webpage to hg init, didn't help much because it was seemingly all about the command line interface.
Most of the tools out there in DCVS land seem to have as a prerequisite that you already know how to do it the hard way. If I've already climbed the learning curve for the hard, but powerful, way I'm probably just going to keep doing it that way.
The opportunity is for a tool that makes easy things easy. I signed up for the SourceTree Windows beta, hopefully that's it.