I disagree. With practice, you can write very clean Perl code that's easy to follow along because all the modules play along nicely. Ruby OTOH has a culture of gems doing all kinds of mysterious black magic that make it difficult for a maintainer to figure out the data flow.
Source: Maintained a 300 kLOC Perl application for 3 years, now working with legacy and new Rails applications.
Sometimes I mumble under my breath that Ruby is Perl for the 21st century - gleefully creative hackers leaving behind overly clever code for far less happy developers to deal with.
A culture of optimising the elegance of the API over the simplicity and maintenance of the implementation.