According to this podcast, Tinman is not only coaching Drew Hunter still, he is coaching Gracie Ping? I had not heard about Ping.
How many miles a week do you think he has Ping doing. According to this podcast interview it is likely 6.5 hours of running a week.
You think she will burn out under Tinman?
http://www.finalsurge.com/blog/article/podcast-12-tom-schwartz