MaxKlokan said: "I am in my late thirties, and I have the impression the Perl is more for "old" foxes like me ... "

I turn 60 in a few months. I guess that makes me a 'geriatric fox'....

The youngest Perl programmer that I have encountered was 12 or 13; the oldest I know of is two years older than I. That gives us an 'average age of a Perl programmer' of 37-ish.