[jasonkester]

For a fair comparison, you'll need to take a 20 minute break to walk to Starbucks at 9:30, then spend the entire time from 10:30 to 12:30 discussing where to go to lunch (then an hour or so actually going there), then with luck another hour eating cake from 3-4 because it's Stan's birthday.

Do those things from home, then decide whether you're more productive than at the office. Otherwise you're not really comparing apples to apples.