Our twitition.com site has been very busy for some time now and always gets more than 10,000 visitors per day. Lots of people are big fans of the site and use it every day.
Last week the site got a pretty big spike and ended up getting 89,847 visits in a 48 hour period after both Lady Gaga (6.5 million followers) and Justin Bieber (5.4 million followers) tweeted out links to the site.
As you can see from the chart below Twitter traffic was pretty huge and if you include direct traffic (people using Twitter via apps) then it adds up to around 75,000 visits.
Interestingly if you drill down into the referral paths for Twitter you can see that a lot of traffic comes from the stars pages rather than the homepage. Justin seems to have more engagement with his page than Gaga according to this data.
Over the last few months we have put a huge amount of resources into improving twitition.com and the site now has a new front end design, easier to use interface, optimised back end code & database as well as a shiny new dedicated server. Handling lots of Twitter traffic is pretty hard because it comes in big surges, much like the Digg effect but worse.
Pretty interesting study of the power that Twitter now has.