LinkedIn saw record traffic in September 2008 with 11.9M unique visitors, up more than 10% from August (10.8M) and a gain of 193% since last year. (

Amazing presentation here:

There are four types of LinkedIn users: (,cntnt01,detail,0&cntnt01articleid=52&cntnt01origid=16&cntnt01detailtemplate=newsdetail.tpl&cntnt01dateformat=%25m.%25d.%25Y&cntnt01returnid=46)

* “Savvy Networkers” (est. 9 million) are likely to have started using social networking earlier than others, are more tech savvy, and more likely to be active on other SNS sites like Facebook. Savvy Networkers have the most connections (61 on average) and are more likely than other segments to use LinkedIn for a wide variety of purposes other than job searching. Savvy Networkers have the second highest average personal income ($93,500) and may often have the word “Consultant” in their job description.
* “Senior Executives” (est. 8.4 million) are somewhat less tech savvy and is using LinkedIn to connect to their existing corporate networks. They have power jobs which they are quite content with, and are likely to have been invited by a colleague and then realized how many key contacts were on the site and started building connections (32 on average). Senior Executives have the highest average personal income ($104,000) and have titles such as Owner, Partner, Executive, or Associate.
* “Late Adopters” (est. 6.6 million) are likely to have received numerous requests from friends and co-workers before deciding to join. They are somewhat less tech savvy and are careful in how they use LinkedIn, tending to connect only to close friends and colleagues and have the fewest number of connections (23 on average). Late Adopters have the lowest average personal income ($88,000) and have titles such as Teacher, Medical Professional, Lawyer, or the word “Account” or “Assistant” in their job description.
* “Exploring Options” (est. 6.1 million) may be working, but are open and looking for other job options often on, perhaps in part because they have the lowest average personal income ($87,500). They are fairly tech savvy and use SNS for both corporate and personal interests.

* Most users connect to people they know, including those they’ve met only over the phone
* Users like the professional and business oriented look and feel of LinkedIn compared to other SNS
* Users tend to be more senior (56% are “individual contributors”, 16% are management level, and 28% are director/VP level or above)
* The majority (66%) are decision makers or have influence in the purchase decisions at their companies (decision makers also tend to be more active on LinkedIn)
* And perhaps most interestingly, the greater the number of connections the greater the likelihood of higher personal income - those with personal incomes between $200K-$350K were seven times more likely than others to have over 150 connections!

According to Nielsen, LinkedIn grew a whopping 319 percent since last year (2007). This is in comparison to Facebook which grew almost 100 percent.

Percentages can be misleading though and these numbers also can be highly inaccurate as show with Google’s recent quarter and Comscore’s blunder.

The report shows that Facebook only had approximately 25 million users in March, whereas says Facebook had 31 million unique viewers the same month.

This could be a direct result of the growth of social networking sites into demographics that traditionally stay away from social networking. As I wrote about this morning, the Boomer generation has an increasing number of people on social networks. Users over 45 now account for a whopping 31 percent of LinkedIn’s user base.

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