I am honestly unconcerned about that and I am actually happy that - looking at the site - he uses rFactor 2 for his services.
My posts were mostly just poking at him to get him to say stuff in a more constructive manner :-D
As I did not even try the BMW MHV8 yet, I don't question, nor intended to question, per se, if he is right or not, I just don't understand exactly what he meant and the way he made the approach: personally, if he is technically qualified to contribute for the end result being a better mod with his criticism, he should make it clear right off the bat his qualifications AND, moreover, I believe he should do it privately...
As a side commentary, I find it a LOT more serious the fact that the Ferrari and the Porsche share the same physics, as they have completely different configurations...
But at the same time I don't take it hard on Nick, as he regularly updates and improves the end product... and the obvious lack of an Hybrid powertrain that matches the class LMH/LMDh is - I assume - even more complex to try to overcome in the case of the 499P...