Seriously your ipad batteries have been ok??
My ipad is less than a year old, and before the update I could go a couple of days in-between charging with pretty heavy use.
Not I can see the battery dropping hour by hour!!! For example, I set the radio as an alarm some mornings, and play it whilst I get ready. It used to drop a % or something... Not it can be up to 10%.
If I use it on a evening only (say 7pm to 10pm) it can eat up a good 40% of battery... That was unheard of before, I used to rave about how good the battery was.
And this was immediately after the update, sudden decline
I might call apple and have a whinge.
FYI, I unplugged my ipad from charge about an hour ago, I haven't been using it for an hour, I've just checked Facebook now, and come here immediately, and it's dropped 5% charge already.