People missed what I thought was a big clue in a Macrumors post from about 4 months back. People found some strings in iOS that referenced new chips (not devices, but chips.) The article noted that the first A4 had something like 1,1 (again this isn't referencing the iPad itself, I know those get those type of designations too) and that the A5 had a 2,1 reference and the "new chip" showing up in strings was 2,2. To me I think that was a clue that Apple's new iPad would NOT have a quad core processor as I think the full version number jumps reference increasing cores, and was a big clue that this is an up clocked version with a much stronger GPU.
I'm NOT going to be disappointed either way as long as the performance of the iPad 3 is class leading, even with the mega resolution screen and I have no reason to doubt Apple is confident it will be, even if it is dual core and Android tablets go 4 core this year.