This might be true, but my daughter (13) uses Gimp to draw. But then again, she might be an expert because she is recording a 'Lets draw Mangas' thread on Youtube: http://www.youtube.com/watch?v=HhMwfWFG5GI
She might very well be. Using Gimp for content creation for some time could make her an expert (especially a fast learning and seemingly quite intelligent kid). Though painting itself isn't the main usecase gimp seems to want to support.
Though like so often: Only because a software wants to support a specific target doesn't mean it will be completely unusable for doing everything else.
Funny, my daughter's 13 too and constantly drawing manga characters with Gimp (http://julieflorac78.deviantart.com/gallery/). I've just bought her a wacom tablet, that's much easier.
Thanks, I had not heard about that before. Although a little sad, as I know a lot of casual users using it right now (even including some young kids). But I guess at least the "Creating Original Art" can be seen as targeting people like game developers.
MyPaint and Krita are actually both great programs for digital painting. David Revoy is an artist who uses both (and also created one of the brush sets for MyPaint) and his work is worth looking at: http://www.davidrevoy.com/2-portfolio.html
Casual users are no longer the target.