I don't know about St. Louis, except I think other people on this board has gotten interviews from St. Louis (i think baylor21 has one)
as for George Washington:
AMCAS: submitted june 27th
processed august 9th (i beleive)
gwu secondary: completed when I got it (i don't remember when, but i beleive it was in the end of june)
got postcard saying my app was complete
then got interview letter
pretty fast, in my opinion, when they had all the material.
btw, they are giving interviews to people who have not had their AMCAS processed.
btw, not EDP
hope this helps
good luck on your application