Brenner Guide to Editing Timeframes

Hello all. A TW in my area referred to something she called the "Brenner Guide," which gives statistics for time needed to perform certain tasks, based on national surveys. For example, according to this guide a TW can copyedit six pages per hour. Has anyone heard of this reference? This TW spoke about it as though it were an industry standard.

Hint & more...

A bit of circumvent Googling comes up with this: Gary Brenner, “Editing 101: All About Authors”,. Righting Words, November/December 1988, pp. 11-17. - which promptly becomes a dead end... For more about editing timeframes, I recommend this page: http://www.techscribe.co.uk/techw/documentation-project-metrics.htm, esp. for the links at the bottom.