I was talking with a staff member (manager of some sort) at the Bellagio about 2 weeks ago and we were talking about something and he said that at a smaller book it may take 50k to move a line where as at a big book like the Bellagio it may take 200k... I can't remember exactly what we were talking about that made him say this, but it makes sense. The books want half their money on one side of the line and half on the other that way they don't lose - they make their $$ on the juice, not on the game itself.