Yeah I remember that to. But there's a massive difference between Longhorn and Vista. It seems a lot was cut out, a few stuff cut to get it out faster. I think by the time anything stable enough for hardware manufactures was released, with a lot of stuff added and a lot of stuff removed, they where given hardly any time to change what was needed.
I could be wrong but I did hear of professionals complaining about this, saying that so much was changed, like the whole code was re-written and everyone else had to try and quickly adapt to it.

