they were switching but i am sure they were running on four cores for a reasonable amount of time, a couple of seconds maybe 4 or 5. It happens quite a lot during GT1 and GT2 tests and i had ran the bench 3 times and is showing similar behavior so i can say it really ran on four cores and two extra cores are always on idle.

from what i can see during the cpu test, turbo didn't kick-in frequently and a lot of cores where idle. it wasn't showing the same behavior with those graphics tests