The only concrete assertions I see there are that regular expressions are error-prone (fine, if you really think so, don't use them), and that data in Perl aren't s-expressions (I'm assuming that's what he's ranting about when he's implying that all Perl is good for is massaging input formats).

So pretty weak: CPAN is the supreme, far-and-away, no-other-reason-or-language-comes-close (at least in 2000) to use Perl.