Where does Wordpress host? And what is their support like? And how big do you really have to be to get admitted behind the velvety-php rope?
Support is handled by a worldwide team of some of the nicest and sharpest people you'll ever meet, with escalation to the core people behind WordPress. We've seen and worked with more high-profile blogs than probably anyone else.
The typical floor for VIP is 1 million pageviews a month. Many clients do many times that, or host dozens of sites with us.
I'd imagine the move has more to do with wordpress.com actively updating the software vs. hw / network infrastructure.
Am I wrong in assuming that TechCrunch was hosted on CloudSites?