Gotta admit, though, it stings that poopy flicks like TRANSFORMERS 3 & CARS 2 are making tons of cash while this (which is absolutely no worse and at least much more original than those two) is getting pummeled.
Transformers is a sequel and Cars a kiddie flick. In addition, it is an average flick the third of its kind this summer (super hero). Therefore, its box office success is rather limited.
I imagine the same will hold true for Captain America regardless how good / bad it may be. The release date follows the last Potter film and it is the forth of its type this summer.