I had noticed throughout my play time that the spell 'Turn Undead' did not stagger undead like all the other turning spells.
This was caused by the "push" variable set for the spell was at 0 (zero), while Turn Lesser Undead was at 50, and all the other spells were at 100. This didn't seem right to me, so I changed the variable to 75 (seemed like a nice middle ground).
This bug has been reported to the fine folks working on the USKP (who tipped me off on how to fix the issue), so this fix will serve as a nice stop-gap until it is added to the USKP (if it is added)
So now, Turn Undead is a useful Adept-level spell!
http://skyrim.nexusmods.com/mods/30934/