Yep. It's probably not unusual for mail delivery in a university to be slow, especially in the summer.It doesnt surprise me that he sent out a "manifesto". He wants the world to know how great and powerful he is. The VT killer did the same thing (i refuse to remember his name). There is still no confirmation that he actually ever spoke to a psychiatrist be it at school or else where. I am sure if he did it will eventually come out in time. The police/court put a gag order on everyone because they are building their case. Its the way the system works in high profile cases except for FL where they have the sunshine laws.
Also I worked for a big company and would get things in the mail. Items could easily sit in the mail room for days even weeks before they ever got to my desk.
Moo