Search Engine Dance
At last count Google had 37 server farms. When Google tests modifications in their algorithms, changes are implemented to specific servers. The traditional Search Engine Dance tool enables an A/B/C testing of how the changes affect the returned Search Engine Results Pages (SERPs). The purpose is to see how the results differ when a search is conducted for the same long tail keyword phrase across the three sets of servers on which changes were implemented.
This Search Engine Dance tool has been modified to present results from three different search engines rather than from three different Google servers. The results will appear simultaneously from the three search engines with the largest market share: Google, Yahoo!, and MSN.