in reply to Percentage of MS Windows Perl Users
"This suggests to me (making certain assumptions that the testing population represents the broad user population) -- that only about 4% of Perl users are on Windows."
The basis of your assumption is flawed. Some testers run smokers for several different OS. Windows has licence costs. If you feel Windows is underrepresented it's a voluntary effort, see Why are some OS blank in CPAN Testers Matrix?.
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Seekers of Perl Wisdom