>>500091Blender's sculpting capabilities are still fairly new compared to some other software packages. It only got dyntopo a couple years back (I believe it's roughly equivalent to dynamesh, although I'm not sure since I've never used ZBrush). It's had sculpting in general for a while, but the workflow was a lot different than it is today.
So while there probably are some people who "got good" using Blender's sculpting, you probably won't find a lot of them yet.
There are a number of people on blenderartists that do very nice sculpts, but I have no idea what they started on.
All that said, it doesn't really matter what you learn on. Learning the interface of a new sculpting app is easy compared to learning to sculpt in general.