I thought 760 was the original super fast Simonis, which was deemed too fast for the pros, and my understanding is that Greg Sullivan actually worked with Simonis to come up with the 860, which is a little slower than the 760. This was back in the late 80's or early 90's, in transition from the napped cloth that dominated in prior years -- so going from the napped to the 760 was just too much of a difference. BTW the room I played in in the late 80's definitely had that 760, which was the first I had seen of it, and at first it felt like you where playing pool on a skating rink!
I believe now they have 860 that has a treatment that helps it resist stains and last longer, and it may play a little different from the standard 860.
Bille your table speed probably has more to do with where you are in the deep south, with high humidity. You can run a dehumidifier like someone mentioned, and you can also get a humidistat to measure (they are cheap, like a thermometer -- but the dehumidifier will also give you a reading, so you don't need both).