they've done some crazy redesign things that they've had to roll back (writer blogs didn't have permalinks for about a week earlier)
Wild speculation, of course, but perhaps they're doing incremental design and playing with A/B/multivariate testing to see what works? They have the traffic to pull it off.
Wild speculation, of course, but perhaps they're doing incremental design and playing with A/B/multivariate testing to see what works? They have the traffic to pull it off.