Interesting audience. I would start out with something like
'Perl is one of the richest open cross-platform languages out there today... It's been actively supported by a community of developers since 19XX and is routinely called the Open-Source toolkit.'
Bottom line is I've been doing Perl for so long I've forgotten a lot of the other languages I've used... simply because I have yet to find something Perl can't do for me.
Once I started, I haven't looked back :)
I guess the trick would be to grab their attention at the git-go and then show them the Perl OO mechanism, a traditional method (something like top-down design) and then the 'scratch-pad gotta have it now' script. Showing some flexibility and emphasizing the code is as good as the coder.