iPad battery life ios6

Is anyone experiencing a reduced battery life after ios6 upgrade? I'll to be more quantitative, but I took my iPad from the charger this morning, 100%, after 7 hours of very intermittent use, that I can estimate in 3 hours at most, I have now 30% left. I was expecting 50 or more. I do always the same things and I do the day with no problems, it is no more the case.