They aren't all 2011. I had to cut open 100 rolls tonight so I could dump them tomorrow, and found maybe 150 coppers edge sorting, another 300 or so non 2011 zinc.
All of these rolls showed shields or 2011 obverses out of the box. It makes sense - the coin suppliers dump bags of new coin into their counters along with whatever else is already in the hopper. Many of the rolls were 100% 2011, some had one or two others, and a lot had 10 to 15 others. 3 wheats, couple Canada, etc.