I'm surprised it went out that soon. Glad it was covered for you.
That was probably me. When I had the timing chain re-call done (March, 2014), the tech. noticed coolant on the under side of the water pump. It was replaced under warranty (easy job since it had to be removed for the re-call).I recall someone else out here had a water pump go last year. I forget how many miles.
Glad you got it fixed at zero cost, but it sux that it went this soon.