The top Twitter client is still the web

"According to a new study from social media solutions provider Rapleaf, the most popular #Twitter client is the web. After looking at the 20 most recent tweets from over 4 million Twitter users, it was clear that updating your status online via Twitter.com is still the dominant way that most people use Twitter, with 65% of tweets attributed to this method. As far as the third-party clients go, only a small handful of clients had enough users to warrant their own slice of the pie chart, and those slices were in the single digits. - ReadWriteWeb