The UI seemed reasonably responsive, and though we weren't able to test the browser without a connection, we imagine the stock S60 apps work every bit as well as they do on Nokia fare.
The turbines passed a G59 test last week, which looks at safety standards required for the connection of a generating plant to existing distribution systems.
In my battery test, where I keep the screen at 75% brightness, leave the Internet connection on and email collecting in the background and play videos back to back, the Nexus 7 lasted 10 hours and 44 minutes.