The folks at Yahoo must be yodeling with delight today. A month after posting a disappoint Q2 report, the web giant has usurped Google for the US web-traffic throne. At least for July. Yahoo scored nearly 196.6 million visits during the month, according to comScore, topping Google’s 192.3 million and ending its five-year run at No. 1. That controversial $1.1B acquisition of Tumblr might have had a hand in Yahoo’s win. Although comScore still ranks Tumblr separately — it finished 38th in July — a footnote on the report says the social networking/microblogging site “assigned some portion of traffic to other syndicated entities.” Then again, fantasy football drafts are looming, and no one comes close to Yahoo’s domination in that space.