Following on from the news last week of the highest peak so far in Twitter usage due to the superinjuction saga, that story has got even bigger and driven even more people into the hands of Twitter. Robin Goad of Hitwise has produced this graph showing the latest peak this weekend, with Twitter receiving 1 in every 184 internet visits in the UK, with a whopping 12% of visits coming from new users (as opposed to Facebook's 0.5%):

Twitter UK Internet visits May 2011

What's perhaps more interesting is the changing demographic profile of Twitter users in the UK, with its user base starting to look much more like the average UK internet user:

Twitter 2010 vs 2011 Mosaic

As Robin explains:

You can see that visits to Twitter in May 2011 (the red line) are much closer to the UK online population average (the blue line) than they were in May 2010 (the green line). In particular Twitter relies less on visits from Liberal Opinions, New Homemakers and Upper Floor Living – groups which are characterised as young, mostly single people who like their gadgets. Twitter is no longer purely in the domain of early-adopters; rather it is becoming a universal tool which is being used increasingly by all types of Internet users, regardless of their online preferences.