Don't know about Burnes, but I like this one - everyone can relate to it. For 9 ball anyway... There is a really good one on the forum, but I can't find it. Will post it here if I can find it
Here's a boiled down version of Phil Capelle's 9-ball rating system... (p. 361 of Play Your Best 9-Ball)...
C Player: best daily runs are 5-7 balls... most of which are routine...seldom runs a complete rack... 1-2 racks is personal best
B Player: ocassional break and run... 2 racks if balls are lying well... average run is 5-6 balls... 2-3 racks is personal best
A Player: runs 1-2 racks quite often... a typical run is 7-8 balls... personal best is 4-5+ racks
Runs do not include 9-balls on the break nor do they include early combos on the 9.