Don't you see that that entire paragraph is pure imagination/speculation without any basis in known facts, genetic or otherwise?
You cannot turn a lie into the truth by saying it a lot of times. Evidently they have taken the horse evolution chart off TO.
But I did find the following that might interest you regarding this subject:
http://www.angelfire.com/mi/dinosaurs/horse.html
http://www.apologeticspress.org/docsdis ... 2-sa13.htm
The first one is fairly elementary and easy, the second a response to an evolution article. This last one is pretty packed and written by two Ph.D.'s.