It'd be nice if he at least _mentioned_ that Debian bootstrapped armhf first (first half of 2011: see http://buildd.debian-ports.org/stats/ ). It's quite a lot easier the second time as you actually have a system to run on.
And that we've been maintaining a 'general purpose ARM distro' for over a decade.
Not to say that Ubuntu/canonical haven't been doing good things (fixed a lot of thumb2 bugs in their v7/thumb rebuild, doing good work on SMP and server load testing), but a bit of credit where it's due is appreciated.
'First OS to support A15', indeed. Beware marketers bearing shiny gifts and talking crap.