Nature of Guillotine's accuracy?

[Gerion]

Has anyone done any tests on if Guillotine's accuracy penalty are straight -accuracy, or if they are -hit rate? (latter would affect TW mobs as well as higher ones).

Also, if anyone has done any tests, what is the approximate value for the penalty?

[Fryte]

I don't know, but it really pisses me off that I parse at 95% accuracy, but my weaponskill TP returns are all over the place with Guillotine.

(just used this as a nice place to bitch, sorry.)