18 runs on a set of Blues at GB this year, Mike. Only picked up about 3 tenths when I put on a fresh set. Wear looked good all the way down to the belt. Greens are much faster at night and in cooler temps, but will not last long if you run them in any sort of heat. I've run Greens at Mimi's with decent results. I have about 20 runs on the set I'm currently running and plan to continue running them.
Can't say anything for Sorex tires because I haven't tested them, but it seems a lot of ppl like them.
The only other rubber tire I've run this year was the MM Sweeps at the Nats, and they turned every car into a dump truck.