I think this paragraph says it all. She IS the reason that we won the silver medal.
"Thompson, however, had the best split for her team (53.77) and was a big reason why it earned the silver medal with an American record of 3:36.39. For swimming in the prelims, Correia also earned a silver medal but was not part of the awards ceremony"
And this paragraph:
Correia, the first black woman to make a U.S. Olympic swim team, had been passed over even though she had turned in a lifetime best of 54.74 seconds for one of the two fastest times among the Americans in the morning preliminary round. Typically, Olympic coaches will take those two and combine them with the first- and second-place finishers from the American trials' 100 free to form the finals squad.
So the "passed over" swimmer had a personal best of 54.74 seconds. The "senitmental favorite" had the best split of team at 53.77 seconds and an American record. So to me it would seem that the coach did indeed make the right decision.
It just seems silly to be trying to second guess the coach. Life is FULL of disappointments. You get over it and move on with your life. Their are lots of atheletes out there that would love just to have a spot on the team.