Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Even NetApplications, which people tout as showing a tiny 1% share of web-connected PCs shows it:
Around July/August of 2011, the share for GNU/Linux took off with growth of up to 10% per month. That’s 1.5 million new machines per month running GNU/Linux if you believe Net Applications. I think the numbers are much larger so this is a lower bound to the effect.