Do you look beyond stats and look at context? You highlight Col. Radley-Walters as the example of the most succesful Allied tank commander; iirc he only fought through the 11 month long NW Europe battle were we fielded more tanks than the Germans (i.e. more men to complete over targets), were most German tank losses iirc was not from tank on tank fighting etc (so tankers had to complete with tank hunters, jabos, and AT guns), not to mention just how we fielded our tanks (i.e. tactical use). How can you diss this man when he didnt have the same opportunities than the those who fought on the likes of those who fought on the Eastern Front where there was much more chance to blow shit up? Skill does come into it, noone has said otherwise, but from the words of the best they said opporunties play a much larger role in it.
By your apparent own logic, the tank commanders in Burma must have been truley incompendent because they sure as hell were not going to be racking up the tank kills ... oh yes the Japanese didnt use that many.86.17.0.3