To me Haye wasn't active enough to win this fight. Sure his hitting percantage was higher, but as the challenger you should either knock your opponent out or win because you were way better - both wasn't the case. I think he won because Haye - Klitschko is more markatable than Valuev - Klitschko. Nobody cares about to Sowjets hitting each other up.
If Haye fights the same style against tzhe Klitschkos it will end pretty bad for him...