You basically said it was his age. Most of this is all anecdotal evidence anyway. I have sat with many low time people of both modular and Integrated and found that the amount of aviation knowledge (not flying) is a good indicator.
Can you tell me the difference between an A330 and A340? We got told a Saab 340 was infront of us and FO asked me what that was.
This is anecdotal as well but I think works better than modular Vs integrated cause I have had great from both and awful from both as well.