So
HERE's the first video I see with both ipad 2 and 3 under sunlight (A weak late winter's sun in Germany). Skip to 3:30
It may be the cam, but seems like ipad 2 performs better than the newer one in sunlight! I mean, at least in in this vid. Let's wait for some more vids.
At present seems like it's confirmed:
the spot is purely misleading.