I also tested extensively on level 47 monsters ( sets of 300 to 400 hits). on t6 in a given attempt my parry rate, which should be around 22% once you factor blocking, was sometime 5% and sometime 35%, due to the limited amout of hits (under 100 on any given try) of course your ealers cant tell the difference between 15% and 22%. doesn't mean it doesn't exist or is not huge