Suggested velcotity params for servos?

Can anyone recommend velocity params for servos? I've got the big-big
servo motors from Dan Mauch's site (I can't remember which ones they
were, but they cost $199/each) and I'm running these with geckos at 60v
in a 1/3 timing belt setup on my mill/drill. I'm running with TurboCNC

My max reliable (without faulting) speed is 35Khz
That's pretty easy to guage.. But I was wondering about the starting
frequency and acceleration?
I know steppers can have a high start frequency, since they effectively
"hop" to the first position with a high torque, but what about servos?

I'm really not sure here.. Any good way to derermine?
I'm worried that I'll be accelerating too fast, or starting too fast and
sacrificing accuracy as the servo lags behind just far enough not to
affect the signed 8-bit lock (128+- count) of the servo. But at the same
time, I don't want to enter 0 as the start rate if I can do better.

Any suggestions? Good ways to check (without a DSO?)
Thanks!
~Abby