The feed view seems to be little less jerkier than before, might be a placebo.

In my calculations (visiting several sites multiple times with different clock speeds) the web browser was about 0-25% faster (average being 15-20%) when using 1350 Mhz clock. Basically, heavier the site bigger the difference.

But I have to say, I haven't had any problems with the performance on default clocks either.