Dave optimized my site on foxyfighter.com and I’ve been extremely happy with the results.
-- Debbi Chan, Foxyfighter.com
He’s responsive and always helpful no matter what the problem! I highly recommend his services and expertise.
-- Jessica Didion
The work Dave provided us was on time, worked flawlessly and was easily integrated by our onsite tech team. A great value for a great product.
-- Jim Crews

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Google has 2 services:
1. Google Trends
2. Google Trends for websites
The latter (2) is more comparable to services like compete and alexa.
Check out this stat:
http://trends.google.com/websites?q=wordpress.org%2Cjoomla.org%2Cdrupal.org&geo=all&date=all&sort=0
well google trends says joomla is
http://www.google.com/trends?q=WordPress%2CJoomla%2CDrupal+
i love wordpress though
Yes you’re right! I was a bit uncareful / sloppy there. I’ve changed it to the right graph now. Still WordPress.org outranks all! Thanks!
Are you serious? How about comparing apples to apples and use wordpress.ORG instead of wordpress.COM (which is hosting tons of blogs).