Tech off the geek beat
Why, though? Because technology is the second-fastest changing field in news (after fashion). You'd watch what the fashion writers are wearing to find out what's going to be in next season. It's the same with technology, but with a longer timelag. Cellan-Jones joined Twitter in March 2007 – long before it became popular. Jemima Kiss, one of the Guardian's best-known Twitterers (and with the largest total of "followers"), joined in December 2006; the service had only been open to the public since July 2006. Ditto for Facebook.
Thus technology journalists were often the first in an organisation to get (or demand) email, the web, to discover Google, YouTube and so on.
Smugness aside, it's annoying because it assumes such a narrow definition of what technology (and technology journalism) actually is. Arthur's talking exclusively about consumer IT, online media, and associated gadgetry - what the venerable blog calls the geek beat. That's a very small area of technology - and, in significant part, a rather trivial one (the comparison to fashion is accurate). If Twitter or Facebook are at all interesting, it's not because of their enabling technologies.
I'm largely a tech journalist, but I'm more often writing about next-gen solar power (in the current Cleantech Magazine), say, than about the latest ICT gizmo (admittedly I do do that regularly for Crain's Manchester Business, though I try to mix it up a bit with proper tech like aerospace composites). At the moment, I'm finishing up a piece on medical devices - a tech area of which I'm rather keen not to be an early adopter of its products.