Are we going into this again?..
There's nothing wrong with Amy Adams. She's a real woman, she's beautiful, and the fact that she's older than Cavill does nothing but reinforce her beauty. They seem to have a great chemistry on screen, and she's a wonderful actress. I think she'll do the role justice and most people will be pleased.
Ladies, I know some of you get offended easily by such things and I can understand that, but seriously, it's not worth it.
Just as in any racist, sexist, ageist or whateverist comment, there's nothing wrong with being white, black, male, female or whatever. At least as long as they don't make unappropriate decisions like casting a male actor as Lois Lane.
But seriously, it's not worth it.