A recent survey says that half of all written communication is by e-mail and a whopping 29% is via text messaging:

The results among those aged 15 to 24 who took part showed only 5% of their communications were by pen and paper, a lot lower than the older people.

Yet despite the growing use of the internet and other new media, most people still spend more time watching television and listening to the radio.

...via Smart Mobs