With the same 1GB on the 32-bit iPad4s and 64-bit Air/rMinis, how severe is the 64-bit memory overhead vs 32-bit? I've been doing some research and lots of people quoting the Anandtech's review of 20-30% additional usage. That number is great and all, but I'm more interested in real world usage. Does it feel about the same in use or is there a noticeable decrease in available memory between the A6Xs and A7s? I know memory is a sensitive topic around here but hope to get some feedback from those with experience. Thanks.