That's the headline of a post from Ken Pomeroy at Basketball Prospectus. Here's a snippet:
Now, Minnesota is probably not a worse team with Al Nolen on the floor. But whatever boost he brings is easily overwhelmed by the variability in the performance of his teammates over the course of six games, which indicates that Nolen’s influence is that of a role player more than a star. Basically, if Minnesota is going to finish in the top four of the Big Ten, it’s either going to take some luck in close games, or substantial improvement from the team as a whole.