I finally got an update for the TF101 - the latest OS. It works really ok and there are changes on the 'taskbar', such as direct enabling Wi-Fi and bluetooth. I haven't seen any bugs here yet, hope it is a good install.
I have not used Honeycomb, but ICS is really quite good, but I still hate the bottom bar especially while gaming.
They will do it one by one, no worries. My Galaxy Ace's "Gingerbread" is taking many months before it finally released.
The reason why Asus can release faster than anyone else because they have been releasing new hardware faster than anyone else, and they use stock UI mostly.