I don't know. Frankly I really can't say that when I was appointed to the bench I became more of a legal scholar. That may be the case. The chairmen of the provincial and territorial review boards are, by a statutory definition, either superior court justices, retired superior court justices, or individuals qualified to be superior court justices, which of course in Canada means lawyers with a minimum of 10 years' experience.
I take your point, but I really can't comment as to whether jurisdictions that have a judge as a chair are doing better on the legal front than are jurisdictions that don't.