Latest Stats as at 3/8/2009.
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These figures cover the 16-day period 16/7/2009 to 31/7/2009.

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Vista Market Share
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For period 16th to 31st July 2009, figures based on visits, 
and earlier figures in brackets:-

XP 58.1 (was 58.9, 61.6, 62.1, 61.8, 63.6, 64.0, 64.5, 64.1, 67.3)
Vista 25.3 (was 25.0, 24.9, 24.6, 24.0, 23.0, 22.8, 22.1, 20.4, 21.1)
Windows-7 0.7 (was 0.9, 0.6, 0.4, 0.4) 
Other Windows 4.1 (was 4.1, 4.0, 3.7, 3.3, 3.8, 3.5, 3.7, 5.5, 3.5)
Mac 8.2 (was 7.7, 6.3, 6.5, 7.7, 7.0, 7.1, 7.2, 7.4, 5.9, 6.7, 7.8)
Linux 1.5 (was 1.4, 1.1, 1.1, 1.0, 0.8, 1.2, 1.0, 1.2, 0.8) 
Others 2.1 (was 2.0, 1.6, 1.6, 1.8, 1.8, 1.4, 1.5, 1.5, 1.4)

As previously, Vista has moved ahead slightly at 25.3% and  
XP has dropped slightly. My reading says you can only 
download Windows-7 if you already have Vista.
Gee, perhaps Vista has reached an all time peak, 
what with netbooks embracing XP as their standard.

The total sample size was 13044 visits by humans.
 
Browser Breakup
===============

Percentages of visits for the period 16th to 31st July 2009.

IE 62.5 (was 60.7, 64.2, 62.8, 62.4, 62.7, 63.2, 63.9, 66.5, 68.6)
FF 23.8 (was 25.9, 24.9, 25.8, 26.1, 26.0, 26.4, 25.7, 24.1, 23.1)  
Safari 6.6 (was 6.0, 5.4, 5.5, 6.0, 5.9, 5.5, 5.9, 5.4, 4.7, 5.2, 5.9)
Chrome 2.8 (was 2.9, 2.2, 2.3, 1.9, 1.9, 1.8, 1.6, 1.2, 1.0, 1.3, 1.2)
Opera 2.3 (was 2.4, 2.0, 2.2, 1.6, 1.7, 1.5, 1.3, 1.1, 1.0, 0.9, 1.3)
All Others 1.9 (was 2.1, 1.5, 1.5, 1.9, 1.7, 1.5, 1.6, 1.6, 1.5)

Firefox seems to have stalled, and media attention has shifted to
Google's Chrome. 

The total sample size was 12854 visits by humans.

Search Engines Share
==================== 

Percentage breakup of visits coming via search engines 
for July 16th to 31st, 2009:-

Google 85.4 (was 86.1, 86.0, 84.8, 85.4, 83.6, 85.6, 87.3, 86.3, 86.8)
Yahoo 7.5 (was 7.4, 6.5, 7.7, 7.8, 10.3, 7.8, 6.7, 6.3, 7.1, 8.0, 7.8)
Microsoft 3.3 (was 3.2, 4.2, 3.3, 3.1, 2.4, 2.8, 2.4, 2.9, 2.3, 2.5)
All others 3.8 (was 3.3, 3.2, 4.2, 3.8, 3.8, 3.8, 3.6, 4.5, 3.8)

The sample size here was 9186.  For all sorts of reasons, this has 
proven quite difficult to measure accurately and consistently.  

There is a lot being written at the moment about the market share
between rival search engines, given the deal this week between
Yahoo and Microsoft.

Do not believe any figures which claim Google has a market share 
less than 70%.  Do not believe any figures which claim Microsoft 
has a larger share than Yahoo.  These figures are stale, they date 
from early June when Bing was a novelty.  It's August now
and Yahoo is ahead of Microsoft, just as previously.

The Bing Blip.
==============

Here are the final results for the launch Bing, with the figures 
grouped into periods of three days to boost the sample sizes:-

May 16-17-18-19: Bing 2.8
May 20-21-22: Bing 3.4
May 23-24-25: Bing 3.0
May 26-27-28: Bing 3.8
May 29-30-31: Bing 3.4

June 1-2-3: Bing 3.6
June 4-5-6: Bing 3.8
June 7-8-9: Bing 3.6
June 10-11-12: Bing 3.7
June 13-14-15: Bing 3.5
June 16-22: No figures available
June 23-26: Bing 4.2 
June 27-30: Bing 4.8

July 1-3: Bing 4.6
July 4-6: Bing 3.3
July 7-9: Bing 3.0
July 10-12: Bing 2.5
July 13-15: Bing 2.6
July 16-17-18: Bing 3.3
July 19-20-21: Bing 5.6 (unexplainedly high)
July 22-23-24: Bing 3.1
July 25-26-27: Bing 2.6
July 28-29-30-31: Bing 2.6

This week's signing between Microsoft and Yahoo is surely based
on the assumption that their combined share will be higher. 
I doubt it, and commentators are wondering this too.

It also appears the deal favours Microsoft in the long run.
Yet the good results after the launch of Bing have already faded. 

There is a lot being written about the deal at the moment so watch 
out for arguments being supported with incorrect statistics
or dubious assumptions.

Sample sizes not large, roughly 500 to 600 searches per day.
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