Notice I've used the term "Perl-related jobs", not "Perl job". I actually agree with you, if we're to be strict about terminology, but I think we can be a bit forgiving here, as there's already the Perl jobs site and also PerlMonks's nodelet already using such term, so it shouldn't be misleading.

But again, I agree with the fact that what's most important in a job description is not the "tool" to be used, but the expected accomplishments. I wish recuiters and managers thought like that too.