OK, I came across a very pleasent surprise this week. I have started uni again and I take my 11" at every class, it's such a pleasure to type on it. With brightness at 3 bars (it might be low for some, but for me is more than enough because it gives a somehow natural real paper-like feeling because of the high res + I have my room properly iluminated) and WiFi turned of, basically JUST Word for Mac 2011 I mananged to type almost continuously for 3 hours and 1/2 and I lost only 30% and that is with a "fast-charge" aka charging from 0 to 100% in almost 2 hours. Fabulous news for me! I doubt I can actually get 10 hours, but I am almost conviced I will surely be getting 8 hours.