Rondo is not only the best passer now but he's the best since John Stockton, maybe even since Magic. I know Stockton had a boatload of assists, more then Magic, but I'm not sure he was a better passer then Rondo, and I know he wasn't better then Magic.
What "best passer" means could be different to different people.
Stockton was not very flashy but IMO he is the best ever in terms of delivering the ball in exactly the right spot, at exactly the right time for a player to catch in rhythm and shoot. He was also exceptionally gifted in terms of passing with either hand from nearly any phase of his dribble.
People sometimes say "yeah but he was playing with Malone," but I watched a lot of Utah basketball in the old days and Stockton also made guys like Eaton and Ostertag look good. That's not easy.
Stockton vs. Magic is probably an unresolvable debate but I prefer Stockton. I think he did more to make the (much weaker) players around him better than Magic did. But I wouldn't blame anyone for preferring Magic.
I don't think Rondo's close to Stockton in terms of making guys around him better and creating easy shots for others, but that's no insult. I actually really like Rondo in terms of the same attributes, and I think Rondo has a legit claim on being the best passer right now if that means creating easy looks for other players, and making the right plays at the right time.
http://www.youtube.com/watch?v=lAPu4nLzDbQ