When are assistantship offers normally sent out

<p>So yeah I’m trying to decide between a LANL internship + graduate school at a relatively decent university versus work and graduate school at a relatively lesser university and a good deal of it hinges on whether or not I get an assistantship.</p>

<p>The graduate admissions guy knows me and said that he would set me up with something good, but I have yet to receive a formal offer yet. Should I be worried? I sent him an email and he hasn’t responded yet… it’s been two days.</p>