wall,
To me, sharp means knowing how to adjust the line fast based on action received. A shit book waits for someone like Don Best to tell them when to adjust. A good book adjusts it according to dollar value of action they receive. A great book adjusts it according to dollar value of action received by them and competitors on the market, anticipating change before it happens. A super amazing book (like Pinnacle) adds an extra factor on top of all that which to me remains a partial mystery...my theory is that this factor is either:
- an opinion of a top-notch in-house capper
- an adjustment based on the QUALITY of the action, ie. if a player has a winning record in a sport (over a long period, say), they may assume his bet was 5x as large as it really was for line adjustment purposes and if he has a losing record, they may even adjust it in the OPPOSITE direction.
In any case they are doing something funky that really works.