It's not just you, I register very similar numbers all across the board, and while for the most part, Deep Sleep (DS) is preferred, I've also noticed that the amount of DS doesn't really affect my battery life much, if at all. Regardless of whether DS is at 80% or 50%, I'm still registering the same overall usage numbers.
Even if DS is 0% for an hour or two and 918 MHz is at nearly 100% (with screen off), my battery wasn't dropping, i.e. 0 %/hr, so I think on screen is the biggest culprit for battery drain regardless of processor usage. I'm on the 3120 mAh battery and for kicks I decided to lower my brightness from 80-85% (this is typically where I have it) to Automatic Brightness all day and with 50% remaining, I've been up for 16.5 hrs (4 hr on screen), so I've managed to improve my numbers by a couple of hours from that one change.
