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Not So Fast: Yahoo May NOT Have Surpassed Google in July

Ad Age‘s Tim Peterson dug a little deeper in the wake of all that yodeling about Yahoo having surpassed Google for the first time in two years in monthly U.S. unique visitor traffic.

The reporter explains that only Yahoo has comScore “census tags” affixed to its sites. What this means is that for July, the immediate Yahoo numbers came from a much more extensive and specific pathway than those of Google, which were calculated using the more traditional method of a comScore “panel” that was then extrapolated. From Peterson’s piece:

comScore’s methodology likely explains why Nielsen, which relies only on panels for its traffic measures, sees a greater gap between Google and Yahoo and not in Yahoo’s favor. “During July 2013 we measured Google as the top parent company for web activity (170M unique US visitors) and Yahoo as the ranked fourth (126M unique US visitors) in the U.S.,” emailed a Nielsen spokesperson.

That’s a very different scenario than the 196.6 million U.S. uniques (Yahoo) vs. 192.3 million uniques (Google) tally from comScore. And if those census tags are so accurate, Nielsen’s July numbers for Yahoo are very questionable. This could all change again when comScore adds mobile user info to its July stats.

Previously on FishbowlNY:
Yahoo Most Visited Website for First Time in Two Years

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