Highly unlikely - because a) UMich has released on Fridays and Wednesdays, never Mondays and b) schools with high EA deferral rates prefer to release on Friday afternoons so their admissions office does not have to field hundreds of calls from students and parents asking why? What can they do to get accepted? Etc.
The weekend gives people time to process, calm down, recalibrate. And most will decide to not call.
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