the speed in the kinematics editor is referring to mm.(milimeter) (configuarte under options)
Which relation is it to the millimetre? (what time?)
I had a look at the Documentation under "To create joints:" and found this:
9. In the Speed field, enter a value for the speed of the joint (Linear: mm/sec, Angular: rad/sec).
10. In the Acceleration field, enter a value for the acceleration of the joint (Linear: mm/sec^2,