mi writes: We've always suspected that Google might tweak its search algorithms to gain an advantage over its rivals — and, according to an FTC investigation inadvertently shared with the Wall Street Journal, it did. Quoting: "In a lengthy investigation, staffers in the FTC's bureau of competition found evidence that Google boosted its own services for shopping, travel and local businesses by altering its ranking criteria and "scraping" content from other sites. It also deliberately demoted rivals. For example, the FTC staff noted that Google presented results from its flight-search tool ahead of other travel sites, even though Google offered fewer flight options. Google's shopping results were ranked above rival comparison-shopping engines, even though users didn't click on them at the same rate, the staff found. Many of the ways Google boosted its own results have not been previously disclosed.