Easy yes, but quick no. Given variance you need to test for quite a while to get a realistic comparison, otherwise you are just comparing luck (mostly on the smaller pool, but even on middlepool as well).
Not at a variance level I'm willing to accept. Time is required only when variance falls into a range I'm comfortable with. 0.003 BTC/MH is not an acceptable low end spike for me. It could be considered an outlier, but when two separate tests achieved the same low end spike on two different days it was not worth my effort to try again until other clients start reporting better stability.