I-Sobot Servo specs - Please check my math

[RobotServicesGroup]

We have not been able to find the servo specs on the I-Sobot anywhere, so we bought one. The Torque is listed on the packaging as 1.26 kg/cm, which makes sense versus other robots that have torque between 8 and 10. Since the I-Sobot servos are so small, they should have lower torque.

The tricky part comes with speed in seconds per 60 degree turn. The packaging shows the rotational speed of motor (rpm) as 22.4. So 22.4 rotations per minute, divided by 60 seconds equals 0.373 rotations per second. And 0.373 rotations times 360 degrees means the motor can move 134.4 degrees in one second. One divided by 134.4 degrees per second means it should take 0.00744 seconds to move 1 degree. Multiply 0.00744 by 60 degrees, and that should give you a speed in seconds per 60 degrees of 0.446.

Is that math right? If it's right, then the I-Sobot is more than twice as slow as the servos in the Bioloid which have a speed in seconds per 60 degrees of 0.19.

The packaging also lists the rotational speed of the servo (not motor, but servo) rpm at 31. Which measure should we use to compare to other humanoids? The motor speed or the servo speed? What's the difference? Any help would be greatly appreciated.