PPM is basically a proc % based on un-hasted weapon attach speed and can proc multiple times under that "minute". PPM is an average and usually end up much higher by increasing attack speed and by landing more hits under "that minute window" hence why things like Crusader enchant end up being 2-3 "real" ppm instead of 1ppm.
As for RealPPM, the only difference is that un-hasted weapon speed doesn't matter anymore but haste still does matter and landing more attack per minutes (APM) still does matter too but less.
Do you really believe 0.6PPM means we will get one proc every ~1min30 every time? no.
Edit: what LordSpaztic said.
You're confusing the old PPM system with the new rPPM system. Although the rPPM system is influenced by haste, you still get the same average number of procs per minute regardless of being fury with more attacks or arms (Granted arms has a higher PPM rate because of the damage that it provides for arms, compared to fury with mastery/RB etc).
So yes, .6 PPM will mean .6 Procs per minute on average, modified by haste.
As for your APM statement, that's just laughable. Yes, actions per minute mattered under the old system, where it was a % chance to proc on any/certain types of hits. That system is no longer relevant.
So I say again, ever heard of PPM?
Last edited by Darkfriend; 2013-01-14 at 11:06 PM.