In number crunching SAM 460 is barely as fast as the Pegasos2 G4@1GHz if you don't account for the altivec. If altivec is taken into account then G4@1GHz runs circles around the system. Granted, Sam460 has a faster memory interface, but the number crunching figures are quite disappointing.
Not doubting you, but do you care to toss out some numbers on this? I'd just like to know what size gap we're talking about here in performance.