Well-commented source code
Perl is written mostly in Perl.
Across all Perl projects on Ohloh, 26% of all source code lines are comments. For Perl, this figure is 35%.
This high number of comments puts Perl among the highest one-third of all Perl projects on Ohloh.
A high number of comments might indicate that the code is well-documented and organized, and could be a sign of a helpful and disciplined development team.