x2 on HC (Xoom user) -- it's "meh". For example, not microSD support is one major blunder, and performance is lacking in certain areas. Nenamark scores are in the 20's versus the 40's in newer mods here. It's got some bugs to be worked out. The raw CPU speed seems to be faster, though.
There are some very good things, like some of the apps included, and being released. But it's going to take time to get up to speed. I'm actually a little annoyed that we haven't seen a major Xoom update,yet.