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We don't throw this figure around lightly. Certainly some companies use Yammer more than others, but every company uses Yammer differently. Some companies even pay us for it.

Your reply is a non-statement that sounds like it came straight from the marketing/PR department.

What percentage of Fortune 500 companies have at least five users who posted something on Yammer in the last two weeks?

I agree ... we have a free version at our company but nobody uses it

I registered with some excitement on September 11 2008, the day Yammer won first prize at TC50. I was the first Yammer registrant on my Fortune 100 company's network!

I left that company in Christmas 2010 as the first and only Yammer registrant.

Yammer did eventually hire one fellow I have a good deal of respect for though.