For two of the Web’s newest sensations, September was not a good month.
The robust growth that Twitter and Microsoft’s Bing search engine enjoyed in recent months appeared to come to an abrupt halt last month.
Twitter, the microblogging service cherished by everyone from Shaq to Al Gore, saw its growth stall in September — at least in terms of U.S. visitors to its Web site.
The number of unique visitors to Twitter’s site in the U.S. reached 20.89 million in September – virtually flat compared to the 20.83 million visitors the month before, according to the latest comScore data.
As the blog TechCrunch pointed out on Tuesday, Twitter’s flat September came as Facebook, the world’s No.1 Internet social network, lured more than 3 million additional unique visitors to its site that month.
Of course, Twitter’s growth is still up a whopping 1,703 percent on a year-over-year basis. And the comScore numbers don’t tell the whole story, since many Twitter users access the service through third-party applications and thus would not be counted as unique visitors to the Twitter site.