I no nothing about steppers but from a company stand point I believe that if one company advertised 1200 in/oz with both phases energized then all of them would have to advertise this way. For one simple reason, people tend to believe the advertisement and don't tend to investigate further, And this being the case, the big mondo numbers (like 1200 in/oz) compared to half that number for the same prices, most people would buy the 1200 in/oz.
Now the people on this sight I would have to say are in the top of the IQ pool, and being a DIY's we are not lazy (well not that lazy ) so we tend to ask these types of insightfull questions.
So that being said, I think everyone advertises the motors the same way and the ones that don't probably have a huge clarification saying how all the "bad" motor manufacutres do it. Kinda like with 3 phase induction motors (20hp vector drive, ya right and I got 12"'s to prove it! )
thanks
Michael T.
"If you don't stand for something, chances are, you'll fall for anything!"