From the above link, MIT's visit date for admitted students is Feb 28/March 1.
It seems obvious to me that a university, particularly one of MIT's stature, would know better than to admit a student and then invite them to a visit with less than a week to prepare.
Time/planning issues aside, schools generally fund travel costs, and domestic flights are expensive enough to book so close to the flight date, let alone international ones.
I guess it ain't over until it's over., but can't say it looks good, y'all.