That's for maxmemm full run rules mate because that will bug the overall score which is calculated.
This is more in line of not running game tests on a 3dmark11 physics contest.
Seems pretty fast to me. Fred always ran cl5 twcl7 which was slower, if you can run cl5 twcl6 and have it be faster than cl6 twcl6 than why not? Everything that makes sense on paper doesn't always translate to the real world