This is not to bash you or that dyno...this is just part of the open discussion. This is just my observation. One thing I have noticed with the hub adaptive dynos is that most shops have them set-up to accelerate at linear rates...when I have never seen a Subaru generate a linear torque curve thus that dyno tends to overload and underload the vehicle depending on the RPM range of the test.
I have also noticed that the holding feature is not as quick to react as the Mustang or Dyno Dynamic Dynos which makes MAF calibrations a little more difficult.
Regardless of which dyno a company chooses...a chassis dyno is a tool, it can have all of the bell and whistles in the world. But the operator needs to be intimately familiar with the equipment and how to properly operate it to get an optimal tune.