He sounds like a bastard.
You can still do hop turns on your board, just put your weight forward and pop the tail around. I use it in Moguls all the time.
If you are on a slope steep enough to be hop turning, you should be in a sideslip position anyways.
Here in Canada, we have specific guidlines for snowboards, some Zone's even differentiate between hard and soft boots too.
We have only 2 positions in the bars:
Sideslip and Pendulum.
You aren't supposed to straight run your board, but everyone does it, just not on the exam.
At our Apex patrol, we have 3 boarders on Plates and even the Toboggan examiner rides plates. Everyone wants us to pilot the box especially on the steeps and bumps because we clearly have an advantage.
I could try and dig up some of the guidelines on paper if you would like. Come to think of it, the picture on the cover of the handbook has a hardbooter running a tobbogan.