honestly...That does seem a little bit high...do you have your brightness turned up all the way?
In an hour and a half of screen on time I don't think I'd drop from 100% to 35%...but I have the brightness fairly low at all times. Let me look at my battery usage and I'll see what it says as a comparison.
Edit:
Right. Mine was on a charging dock...So no useful data right now. I'll try to remember in a little while to post it and see what mine is consuming