My stepson left the same day. We got the box Tuesday...nothing else yet.
My son left May 21st. He called today to ask questions about his interview and said that he had just started his first week and that he had just sent the form letter which I got today. I think they may be running a week behind.
Some ratings will be interviewed or need additional info for their security clearance. Not every recruit will make that call. There is info on that in Phone Cards and Phone Calls. (Read the page and then go to the third page of comments on that page and read the first comment--the one on the bottom.)
I left info for you on your My Page.