Yeah, when stuffing accounts, LIVE betting or even pre game, sometimes we try to move fast and that can be tough to do with bullshit software holding things up, not to mention the intentional delays and reviews from risk management. It requries special attention, like more people, and after awhile you do get the feel for which order to place which types of bets.
Sometimes you have to hit the slower ones first, which isn't bad as the slower ones tend to move faster or see the money coming because they are watching other, bigger books. By hitting them first they don't see it coming.
So that's a beneficial side effect that's a direct result of the industry's level of sophistication on the bookmakers side.