AC, monster and player alike, is a % reduction. A faster weapon is not "penalized" more by AC. The only thing a faster weapon is better at is proccing effects like Rbow and making aggro.
edit: On the topic of making a mob for players to parse off of, I don't want to get into the discussion, but I will say that we (staff) do run parses pretty often on our own. Tinkaa used to lots, Allielyn still does, and I've taken to doing it from time to time. So while your short parse may not mean a hell of a lot on its own, and we probably won't enact changes based off it--notice Jedz's completely contextless parses earlier--we do however use them as pointers to tell us what we *should* parse. Personally, I plan to rig up a series of parses to find out exactly how much dps a proc is worth. If I can figure out a solid formula for that, I can then use it to better-balance any proccing weapon overall, and more specifically to give an insight on this cane.