<p>First, the April 15 guideline date is just that – a guideline date recommended by the Council on Graduate Education. Departments can then decide independently if they wish to use this date as a “deadline” for anything.</p>
<p>Since April 15 falls on a Sunday this year, most departments I know are trying to wrap things up by the 16th, but also realize that this may not be possible. Directors of Graduate Studies usually have leeway to extend discussions and negotiations with students, and when necessary, we take that leeway, and/or give it, as needed. </p>
<p>My advice would be to call the DGS first thing on Monday morning and ask about the situation with your award. If you know her/his teaching schedule, call before or between classes. You may have to wait longer for the DGS to have the information you want, especially if the DGS has to get clearance from the university to increase your offer. Since your increase was GRE-contingent, it sounds like this is the case. </p>
<p>And in answer to your question about whether your offer will be increased if you sign before the increase is finalized: The funds do not “belong” to the department, they “belong” to the Graduate School. If the DGS asks for an increase, it’s up to the Graduate School to grant or deny the request. As I said, in your case, it sounds like the DGS has to justify the increase to the Graduate School by submitting your new GRE scores. Your commitment to that program will not withdraw the DGS’s request. Your increase will simply be pending until the Graduate School (not YOU) makes the decision.</p>
<p>Disclaimer: This is merely my read of the situation. Your mileage may vary.</p>