You could try sharing with him some real-corporate-world Perl success stories. There is an article at oreilly.com about UniCredito Italiano, an Italian Bank that is using Perl. You could also check out O'Reilly's Perl success stories, which contains more of those.

That said, be aware that liking Perl is not the same as liking Linux. I love Perl, but I consider Linux to be just another version of Unix. I routinely use Solaris, Linux, NEXTSTEP, OpenBSD and MacOS, and use Perl under all of those. Maybe J'oe is one of those who immediately associate Perl with Linux, and because he doesn't like Linux (for whatever reason), he extends the dislike to Perl. Show him that Perl can be useful under almost any other platform, and maybe he will see it with new eyes.

--ZZamboni