Comparing the MBP with an HDD and the MBA with an SSD is complete BS. You can't even compare them, because it's so blatantly obvious the SSD will be hands down faster.
Comparing the Mac Pro with a Xeon and the iMac with a Core i3 processor is complete BS. You can't even compare them, because it's so blatantly obvious the Xeon will be hands down faster.
MBA envy?
Let's not forget that the MBA as tested only had 2GB RAM while the MBP had 4GB RAM.