I have noticed that the 680, 700P and 755P all have the Intel® XScale™ 312MHz processor. The 650 also had a 312MHz Intel XScale processor, though they called it Intel® PXA270 312MHz processor.

I assume that has been no increase in processor performance since the 650. Have people found this to be true, or do you notice an increase in the performance of poky programs when they upgraded from the 650 to one of the newer Palm OS phones?