Determine the speed of a solenoid
My German is not so good.  But you could try a simple mechanics estimate.
So take a force of 10N and a plunger mass (guess) of 100g = 0.1kg, that's an acceleration of 100 m/s^2.  Then distance = 1/2 a*t^2, (distance one way is about 0.02m)  I get 20 ms for one way. (It will be longer than that because the force decreases with distance.)  I'd just buy one and play with it.