Then it's not an equivalent test of battery life.
Well I wasnt downloading any torrents or anything heavy continuously but I was surfing the net + watching youtube videos.
I'd say thats my daily usage patterns with an iPad so its a solid battery test.
No ones going to download torrents on the iPad or continuously.
Either way my 17" i7 macbook pro gets 11 hours of battery life with just wifi on and 1 notch of brightness (tested it on day 1 on campus and at home). If my nexus ones battery life is about to die after the first 6 hours, I can just usb charge it to my 17" mbp.
I'm more curious about the iPad's usb camera kit adapter, to see if I can hook up my nexus one when the battery is about to die to charge off the iPad's battery.
Either way, as I'm already paying $25 a month for Tmobile's 3g, I'm not about to drop another $30 a month on for the iPad. Have the best of two worlds, tethering.
It saves you money and efficiently use the 3g plan your already paying for and besides I dont need 3G EVERYWHERE I go. On my university's campus there is a wifi connection everywhere anyways, its just that once in a while the server will shutdown for maintenance or when 100+ students are connected to the same wifi connection it slows to a crawl and thats when tethering becomes useful.
If I'm in my car, I can just keep my Nexus one on its dock plugged into the car charger and tether it to the iPad if needed. But the android google maps comes with turn by turn directions via GPS anyway, so no need to use an iPad especially while driving!
Maybe if I go on a road trip with my friends then I can tether it to the iPad and use it at the backseat.