linux market share stats quoted by Andrew Meredith
The main stats quoted by http://digg.com/linux_unix/Linux_desktop_market_share_exceeds_Vista
are from April 2007.
Time since public Vista release: approx 3 or 4 months. Add in the OEM market and pre-release corporates / bulk-builders who got it in November 2006, and in a maximum of six months, Vista's market share (in terms of visits to the one site, sqlspace) is approximately one-third that of linux. Not exactly a brilliant return on all that advertising, it must be said, but there you go.
Where things get interesting is the bit of the sqlspace article which proudly proclaims 'W3 schools have confirmed our study' - sadly the W3Schools page linked to shows no such thing.
The W3 schools stats for April 2007 show Vista at 2.6%, linux at 3.4%.
The W3 stats for *July* 2007 show Vista 3.6%, linux 3.4%. So while, on these stats, linux is static, Vista is taking share from other Windows flavours (April 2007 Mac = 3.9%, July Mac = 4.0%).
And just to add to the confusion, Market Share by Net Applications at
http://marketshare.hitslink.com/report.aspx?qprid=2
show
April: Vista 3.02%, linux 0.80%, Mac OS 3.89%, MacIntel 2.32%
July: Vista 5.41%, linux 0.75%, Mac OS 3.36%, MacIntel 2.61%
And yes I'm sure the usage stats from www.onlylinuxuserswelcomehere.com would show something different again.
Regardless of which set of stats you look at, a clear majority of people are using Windows. So it is not exactly surprising that the first beta to emerge from the BBC is for Windows.