Yeah it was a combination of of 3G and WIFI.
This was fairly heavy use for me, I even had to play a 20 minute YouTube video last night to get it from 15% down to 10%. But yeah I guess I don't have my screen on as much as other people do, but I guess when you are judging battery life for yourself it does not matter how others use the phone so for me this is great battery life
I really just wanted to do a new calibration since switching to ICS, and I tried to use the phone as much as possible I was hoping to drain it over the weekend but ended up going through Monday as well.