Well no, it hasn't ever worked. By worked I mean, it hasn't ever gotten into the matchmaking game stage where it minimizes then fullscreens.
I did a little research myself yesterday and came up with the same conclusion you did, but when I changed the refresh rate or hz on my monitor, it didn't do anything. 60 (the base of all monitors pretty much) was what it was originally at, and I went up until it just didn't work period, at 85 hz. On no different setting did it work. I'm at a loss and have no idea what to do >.< but I really wanna play D: