Yes, you use a strobe disk to check speed. I'm sure this table has been checked. And many belt drives don't run at 33 1/3. They run at 33.5 or 33.1, you won't hear a difference.
I'm sure he checked and/or adjusted tonearm, platter movement and belt position. Axis uses a rubber mounted suspension system, the LP12 uses metal springs which can go out of alignment. The Axis is set it and forget it.
My last advise is to play records with the dust cover off. It will sound great.