I have a US Xoom that I purchased middle of last year. I am currently in the US on vacation and I was working away tonight when got the notification that an update was waiting. So since I wasn't doing anything critical I let it go ahead to find to my pleasant surprise it was Android 4.03 IML77. I have seen ICS a bit since my daughter's Nexus S also had it pushed to her when we were here but it's the first time I have seen it on a mainstream tablet.
The biggest thing for me so far?No more typing lag in forums like GZ and a much improved keyboard with word prediction and correction.
Plus the overall look is much nicer than Honeycomb.
Maybe the advantage of having a GED means getting updates faster.