No.. it's nothing like that....
the letter estimates it at 800.... that isn't the ammount they pick
Anyone with a mark over 43 (i think it is) out of 50 gets put into the selection pool, then people from each gallery go around and pick one out.
This probably hasn't started yet... thus they can give out the letters to the some that have been marked, and if any other internals get marked above 43 good on em and they have the same chance too.