Somewhat surprisingly, the latest web traffic statistics suggest that Twitter is more popular in the UK than in its country of origin, the US.
Robert Goad over on the Hitwise blog has more details, including these snippets:
Looking at the Experian Mosaic lifestyle data for Twitter over the same period also paints an interesting picture. The two most over represented types are still both typical early adopters: City Adventurers (High-salaried, twenty-something singles in smart flats in inner urban areas) and Town Gown Transition (Students and academics mix with young professionals in terraces relatively close to universities). However, there are a number of other over-represented types that would imply a more mainstream appeal, in particular Settled Minorities (Young families and singles of varied ethnic decent, in high density, pleasant urban terraces) and White Van Culture (Younger owners, many in good quality ex-council properties, take advantage of local economic opportunities).