I have a MyTouch 4G that started getting bad battery life and I noticed a similarity. In your screenshots, it shows "Android OS" taking 19% of the usage. Users of the MT4G found that it was taking upwards of 50% sometimes. It should be less than 10% in most cases.

The fix was this: after charging is complete, disconnect the cable, and reboot. I used to only make it to 3pm before running for a charger. Now i can go into the evening. I'm not sure the Galaxy Nexus is facing the same problem or not. But maybe someone who has one can try the fix and then check their battery stats and report back.

If this is the problem, and the fix works for the new Nexus, then Android needs some patches. It's not acceptable for the device to run the battery down before the day is over. Could it be LTE? I know signal strength can play a big part in battery life.