I was told there are no SSP guys in the March 7th class. I think they are just slowly trickling out the email invites. I know my group on July 1st only has 5 of 10 accepting the offers. One guy has to defer to March 14th and the other 4 have taken other jobs. They should get to at least the July 10th group with the March 7th start date. Give it time, I bet the rest of the invites go out the first of next week.