Well, it's various sources from being interested in the possibility myself, as a tank and as a crafter, mostly from reddit.
http://www.reddit.com/r/ffxiv/commen...yo/parry_stat/ was the first I could find just glancing thru things, I'll admit I have a low need to satisfy people like you so I don't really feel like going thru all the research I looked into.
And yes DEX affects block rates as well, because I didn't mention that part I don't have my facts straight? lol Anyway, it had slipped my mind to mention it because it's as little an impact as the parry rate increase.
And parry and block rate boosts are bad because the content is such that you cannot rely on them. They do not reliably increase your eHP. And you sound like someone who doesn't even know what that is, go google it. "Do you people even know what you are talking about." Thanks, was a good laugh reading that.