Well, I didn't even need ANY speed enhancement.
Do you remember that sorcerer who dropped out of the sky in Morrowind? The one with Level 1000 Acrobatic?
Using it, I took one leap, hit my head on the ceiling above the open door, slid down the wall and fell to the floor right in front of the opening. Took a couple of steps forward and was ready for the next room.
So, if speed enhancement isn't working, a big boost in Acrobatics comes in very handy.