Well the article even says he technically has a tear. The labrum is like connective tissue which helps keep the humerus in the shoulder socket. The shoulder is the most flexible joint in the body, and it is not a strict "ball and socket" joint as some plastic toys might lead you to believe. The labrum helps to complete the socket formed around the humeral head.
It sounds like a corner of the tissue has already torn from (or to use Dwight's word, is beginning to separate from) the bone in his shoulder. I don't see how it could get any better, unless he does absolutely nothing with his arm until the tissue fixes itself. Otherwise, it will continue to tear away from the bone, and when that happens, a secondary type of "pocket" forms in the shoulder which the head of the humerus will sit in just as well as it would sit in the true socket, other than the unbearable pain. I'm talking "the pickup game stops because everyone is staring at the guy yelling like a zombie is eating him" pain.
My surgery consisted of suturing the torn tissue back together (my labrum itself was torn, in addition to being torn from the bone) endoscopically, and my surgeon actually brought my humerus closer into my shoulder than it was naturally, to help reduce flexibility and increase the structural integrity. My rehab was then all about getting my ROM back for about 2-3 weeks, followed by strengthening. Before any of this, though, I had my arm immobilized in a sling for 2 weeks straight so that the tissue itself could heal.
Of course, being young and in good health aided in my fairly quick rehab, but the recovery from the surgery itself was greatly influenced by my type of injury. I had a specific type of Bankart lesion known as a Bony bankart tear, in which a piece of bone is separated from the rest of the bone, and remains attached to the torn/separated labrum. My surgeon says that bone heals to bone much more readily than the connective tissue would, so I'm interested to hear more about Dwight's "separation."