Yeah, I've tried to use the phone "normally" or actually less than usual this last week and it's definitely a problem, at least since 9.3.1. The last couple of days I haven't noticed any big jumps in life but the drain is still noticeably faster, I'd expect to be ending the evening at around 40-50% based on usage but instead I'm plugging the phone in when I get home from work at around 6:30pm because I'm already in the 30's. When I left it overnight I woke up to 4%, a little too close for me relying on the alarm!
So it definitely seems a real issue, for a number of people at least. How do we report this properly?
*submitted a bug report now*
Dropped 20% in around 40 mins of Safari browsing/instant messaging from 100% this morning, that's not right.