Recently had a discussion about some Python code with some Python "experts" and was able to show them multiple design problems, just because I was able to translate my deep Perl know how to Python.

So investment in dynamic languages as a whole is certainly good.

(citing Guido "from a 10 km perspective above Python, Ruby and Perl are exactly the same language" ->5:50 )

The dilemma is that the industry has no good criteria to judge the proficiency of a supposed "expert".

I'm often dealing with people with >10 year Perl "experience" unable to properly use modules.