Yes by going up on 2 wheels loads up the lee side bearings and also gives the sail a downward force and this in turn slows you down. Unlike sailboarders which pull the rig into the wind giving an upward force lifting the board and reducing the drag in the water.
This video shows the idea well, where on the model and to some what on the full size boat the down wind hull LIFTING and not being forced downward.
This type of boat would never tip over as the more lift it got the less sail would be exposed to the wind and be self limiting.
If you wanted to go super fast on a land yacht try leaning the rig into the wind.to reduce the overall drag of the yacht. Mind you i dont know how you would do it