Just to put more data out there... Now that my beer is fully carbed, I consider pitching at 75 to be a failed experiment. It just didn't help the beer, and I am now detecting some fusels. I'll be pitching at 67 or so from now on....
That result seems to back up some of my experiences.
I am a little curious about open fermenting at high temps. Some webinars by Escarpment Labs indicates that open fermenting can help with ester production and also reduce fusels. My only trial on open fermenting was a Quad about a year ago. It turned out wonderful and was ready to drink very fast (a month or two in the bottle). I don't think I fermented it too warm though. I probably pitched at 68F and let it rise to around 75F.