Professional No-Limit Hold 'em Volume 1 Review Thread

[RacersEdge]

Question on basic concept the book preaches: the SPR = 13 danger zone for big pairs. This number was derived from 3 pot sized bets to give a stack size pre-flop of 1+3+9=13. But this assumes pot-sized bets on the flop, turn and river - which doesn't seem the norm, the norm being more like 2/3 - 3/4 the pot. So should the real number to avoid as far as SPR for big pairs be scaled to like 9 or 10?