Opera used MAMA— their ‘Metadata Analysis and Mining Application’ to trawl the web and returns results detailing page structures, including what HTML, CSS, and script is used on it, as well as whether the HTML validates.
For example, it found out that only 4.13% of all sites on the World Wide Web are web standards compliant (January 2008). This is less than double the number of sites on the World Wide Web that validated for web standards in 2006
Read the key findings report: MAMA key findings
What’s your opinion on the number of sites that validate for web standards at the moment? Was it surprising or just insightful? Or was the percentage close to around what you expected it might be?