The link is a Hollinger story about the Grizz, but on the side bar, he picks out some of the playoffs top defenders, and gives Rudy some praise,
"Rudy Fernandez, Portland: Yes, Rudy Fernandez. J.J. Barea was one of Dallas' best offensive players in the regular season but hasn't done squat in this series, and Fernandez has been guarding him almost the entire time. Fernandez has picked up Barea deep in the backcourt and defended him closely on the dribble; while it seems on paper like this might be a disastrous plan, it's proven quite effective in preventing the speedy Barea from gaining a head of steam."
I guess Nate isn't the only one seeing good defense out of Rudy.