No more than any other kit, if you know what you are doing. Don't blame the kit if you are bad at playing them.
That being said, Elementalist is probably my favorite right now. I started out using Keeper a lot more, but Ele has just so much destructive capability and excellent CC and survivability. It's a great class to play. I also started out liking Archer the best out of the Rogue classes, but I've discovered lately how fun Assassin can be as well. Not a kit I would take on Perilous, though. I know my limits.
First off, it's for all games. Not just da. Secondly I know what I said, from game experience usually that is the case for mage types. I've played
Diablo, wow, tera, gw2, rfonline, rappelz,muonline, perfect world, rappelz to name just the recent ones. By you saying its the player not the kit is like saying that warrior class here is not under powered, but everyone is just bad at it. If you can't understand what I'm trying to say, don't quote me. I play mages all the time including on da. My preference is still hunter/archer first. In a game like Diablo one i would go to tank first over mage. Anyway I know what I meant so you can say whatever else you want herein.