"wear rate" or "wear of pads", I am not one to get into semantics here especially over words typed over the web. Technicians are always given out vague information to customers to get money and brakes are their favorite second only to the preverbial "tune up". I was just trying to help lakelover come to his own conclusions. Sorry if that bothered you.
Glad someone finally read the post and gave you the info you were looking for didn't mean to take you off the wrong path.