Harvard Business Publishing shared some research on Twitter usage last week. The data gave ammunition to PC World among others, to deflate the Twitter bubble, just a little bit at least.

According to David Coursey at PC World:

Across the 300,000 users studied, the median number of lifetime Tweets is one. That means half of Twitter users tweet once every 74 days. Which is also about the churn rate for new Twitter users, many of whom quickly leave the service. Seemingly after tweeting only once.

On the other hand, the top 10 percent of Twitter users are responsible for 90 percent of all tweets. If that isn't broadcasting, I don’t know what is. Twitter would be better served if maybe half of users were responsible for the same number of tweets.

I tend to agree. But none of this diminishes our interest in Twitter. Our interest is driven by understanding what key influencers think, not to use Twitter to monitor broad consumer perceptions.