I was burned on integrated graphics in the past with my 2007 Mac mini; That's why I got the more expensive 2011 Mini (And even BTO'd an i7). Fun fact: the GMA 950 under OS X says it supports OpenGL 2.1, but it lacks shader support and does strange things when you try to run it with a shader program.
Do you have heat issues with your 2011 mini's dedicated graphics when gaming? My best friend's computer always burns up (not literally, it just gets very hot to the touch) when we play WoW or CoD. It's pretty funny. He'll get up into the 190F temps sometimes while my machine sits at 120-140F playing the same game. His machine also just runs hot, even without gaming taking place he'll have 140F temps.