According to all the Dolphins i chat with, a supercarrier would not stand up very well to a Mk48ADCAP or equivelant. Of course that's only their opinion...and submariners aren't biased, right?
As for 2000lb bombs, that big exercise with JDAMs a few months back was against an obsolete phib, and it took 7 2000lb hits or something like that before it went down.