9100s is 0.06 seconds (60degrees/6v)/ I am 99% sure it the fastest around. I am pretty sure Ko Propo and Airtronics both have servos in the 0.07 and 0.08 second range--but I think the 9100s and 9000s take the cake.

I also have a 9000s --which was also rated at 0.06 seconds but with less torque than the 9100s, and to me the 9000s does feel and look a bit faster even with the same speed rating.