That was the point that he was making, and part of why I think . . .
The data isn't invalid. The data is the data. You can gather it from FSO's if you want and let us know what it says, but there are only two things that come to mind that would bias the TBM vs. B5N statistics.
1. If ack strength isn't sufficiently low. Then, the extra robustness of the TBM will make an enormous difference. If FSO auto ack can shoot down a B5N, or if either 5" or quad 40 mm or both are enabled, it is not comparable to the scenario or This Day environment.
2. If A6M2's are not attacking TBM's when they have the opportunity to do so. I've never seen that happen in scenarios or This Day events, but two people commented on their squads choosing not to do so in FSO's. I think it's an MA squad dynamic, which isn't present in scenarios or This Day.