> so on were said a couple of years ago about teenagers using SMS.

But SMS (aka texting) is still rather new in the US, Bingley. An entrenched part of life everywhere else on the planet, but not yet so ubiquitous in the States. I think the fractured cellphone market there may have something to do with that. It is quite amusing to read US tech columnists discussing the rise of the SMS phenomenon, just as the rest of the world starts contemplating MMS (Multimedia Messaging Service/System)