The Spurs are playing great, and the matchup with the Dubs is very favorable, but I don't know how you don't say that the Warriors are the best team in the league, if for no other reason than their consistency. They've had a much tougher schedule, more injury problems, and they've only come up short twice. Even the loss to Milwaukee was close. 1 dud in 35 games is just amazingly good. They play at least two meaningful games against the Spurs before the playoffs, so we should know more by then.
My guess is that the above article is written with the idea of keeping them with something to motivate them.