[mrnoble]

To clarify: I am concerned (or rather, interested) that we are overestimating how stable sixes are, and how quickly we make them. It's a classic gambler's fallacy: I've already put X dollars into this slot machine, so I'll stay here until it pays off. Drivers will underestimate the amount of extra time they are taking gingerly placing their carefully built full stack on the platform, and will waste time that could have been better spent making a second (shorter) stack for the same point value.