Unless you fail to understand what the percentages mean. :) Reminds me of how people keep claiming that PC games are dying because the percentage of PC sales vs console sales keeps shrinking, despite the fact that PC games are making more money year after year... statistics are useless if you don't analyze them intelligently.
The same tends to be true for Perl in terms of UNIX/Linux scripting. It's the language-of-choice for users in that environment who need to hack together some quick something-er-other, so you get a lot of unskilled folks putting together crappy code because they don't know any better.
The worst thing that you could say about Perl is that its syntax makes it possible for unskilled programmers to write very ugly code, while other languages make it difficult for unskilled programmers to do anything without first learning a bunch of concepts and uncompromising syntax rules. Python, touted as an oh-so easy language, requires a user to learn more; you must understand OOP, scoping, function calls, variables, etc. to get anything done. In Perl, you can get an amazing amount done without understanding much at all.