There's something to be said for shopping in a store where they don't earn commission and that would be... I don't care who helps me as much as they don't care if they help me.
I can wander aimlessly around this store without ever being approached by an employee... unless of course, I'm wandering aimlessly around the big ticket items such as TVs or iMacs... which doesn't quite make sense if they're truly NOT on commission...?
In fact, the most interaction I had with an employee during my last visit was when I was wished a good night by the guy standing at the exit... as I left empty handed.