This is an email that I have from MIT aero-astro administrator. She doesn't work for the MSE department, but you can use it as a guideline. I still haven't heard back from them. As the letter states, they boasted a decision by March 1st. That's 3 days away! I'm getting a bit nervous....
Dear Eric,
I'm writing to inform you that your Fall 2012 MIT Aero Astro graduate application is complete and ready for review. We have received all required materials.
Your application will now be reviewed by our admissions committee, and you will be notified of your decision no later than March 1, 2012.
Please let me know if you have any questions in the meantime.
Best regards,
Beth Marois