4,648 posts in eighteen years is an average around four posts per week? But I don't believe that number is correct as I recall one of the PPRuNe Admins "tampering" with my post count in the database some years ago? I suspect the number is closer to 2,000 and many of those posts would probably be in our Moderator's Administration forum, not the public forums.
I'm a person of few words, lest I make a fool of myself. A lesson still to be learnt by many.
"...indicative of a somewhat reduced level of aviation expertise..."
Yes indeed, you are correct.