These numbers are somewhat affected by one organization, the NY Times, having seven blogs on the list and another organization, Wired, having three blogs on the list. That said, no one can doubt that the trend for WordPress has been an upward one.
The following chart is from Pingdom.com.
And here’s a list comparing last year’s results and this year’s results.
To see a list of what each of the Top 100 use, head on over to the Pingdom report.