Most people get on the highly select list. They then accept the people who send in LOI's first. It's pretty interesting. Some people send in a letter of intent and get the acceptance a week later. You can do searches for old GT threads from the past 2 years and find this. They do this so that they have people who really like GT and so they have a high matriculation rate (number of accepts per offers) I would recommend to start sending in letters.