What Furtim wrote i can confirm.
At the "Beginning" i did not use even the saddle :-)
(The Beginning last very long)
Didnt know i have to put it in the Horsemenu.

At the Moment i get a lot of rubber band Problems.
The Time i need to get speed and shout a Cry seems longer as before.

My Conclusion is at the moment to dismount and act as mounted infantry.