@shoemacher – I too believed that higher level birds did more damage but a quick internet search shows Rovio stating from the launch – higher level birds fill destructometer faster and gain more points, there’s nothing about more damage.
One of the guides for AB2 on this forum states, higher level birds do more damage and there’s a screen shot, but the photo shows Matilda and the message – higher level birds get more points, fill destructometer faster, again nothing about more damage.
Wonder how many others thought the same?
It actually makes sense for higher levels to do more damage and it’s strange they don’t!