It's reasonable to state what you notice, & you've done it without offending this geezer.Just reporting what I have noticed.
And by others and their accounts im not alone.
There are differences between young & old. When I was a young'n (under 30), I was far more
the didactic know-it-all. (I know....even worse back then?) I see young folk here who I know
will be different after accumulating more experience. Some people change more than others,
& perhaps some for the worse. I've no scholarly study handy on the subject...just noticing things.