Yes I do.
http://www.wowwiki.com/Procs_per_minute
What's the problem? Ever heard of APM?
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.