This happens every year so I'll say it now.
WashU has to compete with schools on the coasts and people who are not from the midwest/never been to St Louis/etc really do write it off because of the location. Honestly I don't see how St Louis is any worse than Baltimore or Pittsburgh, or Philly...but that's another discussion. Point is, even with the letters, we get fewer applicants than similarly ranked schools on the coasts. So the letters go out as a recruiting tool and I really see nothing that wrong with it, save this...
Getting the letter does not guarantee an interview or an acceptance. So now you can't act like you haven't been told. People post every year mad that they got this letter, applied, and then didn't get an interview. I know it kind of seems like getting the letter means you have a better than average chance, but remember that they don't see your whole AMCAS and send out the letter, they just see your MCAT. Don't fill out a 2ndary just because you think you'll get an interview. Only apply if you're interested in the school--which I have to say is absolutely fantastic and I honestly can't imagine a higher quality medical education. Best of luck to all.