I know this is an older thread, but I just stumbled on it. I just want to say that I've only had good experiences with Extreme Speed. I recognize that anyone can have a bad experience with any group, but want to say that wholesale bashing Exreme Speed isn't warranted in my opinion.
They have run groups that are reasonably sorted. I like to run in RED with open passing, and find the drivers to be very good. The last event only had four cars in that group -- perfect for sorting out my car.
I have LOTS of prepaid events and plan to run with them for the foreseeable future. One of the principals, Joel Perez, is very keen on getting more STs out. I talk to him every time I run and think he's a good guy.
I say it's time to give them another chance. I plan to do quite a few more events there and will post when I go. Maybe we can get a few out to see that most experiences can be good, clean fun!