I didn't find that article interesting. =\ It's just a brief opinion on various aspects of his play, but those aspects need a lot more depth of exploration. For example, Rubio gives quicker guards a certain amount of space. This isn't just because he can't keep up with them, but because he understands his length. Versus Rose, he get beat or screened a few times, but recovered to the spot of Rose's shot attempt to challenge it. He's not that far off from being better than Nash at defense at this point. (Remember how Bibby abused Nash in the playoffs?) He defends differently that a guy like Conley, who is more able to stick to his man. Reke also uses length against opposing PGs. There's different ways to defend. Some great defenders are great ball deniers, while some are better man-to-man. Christie would do some tricks against opposing guards, but he wasn't strong enough to bully guys like Artest used to. Then you have guys like Bibby and Nash who get beat off the dribble and too easily give up.