Most do up to 1.2, 1333 is an exceptional chip, not the norm.
Most of the previous chips I had gotten, and it's been many, fell at 1200-1250 range. I recently got a batch of AXIA code, and 7 out of 10 of those did 1.5GHz. The next I received were AVIA code, and so far all of them are 1.4GHz, and some 1.45, even some booting windows over 1.5GHz. None, however, will pass the stability tests at 1.5GHz with air cooling.
Look at the code on your chip. That should give you some idea.