[2006alum]

From my understanding of the rules, the chosen school likely had to know she signed with them when she signed it:

You should sign your NLI in duplicate. Once you have signed it twice, retain one copy of the signed NLI for your records. You should send the other copy back to the institution. When the institution receives it, they are responsible for forwarding a copy to their conference office. The institution must file your NLI with its conference within 14 days after the date of final signature. If this filing deadline is not met, the letter will be declared invalid.

Since the final day of the early signing period was Nov. 14, the latest the conference could file it is tomorrow. Maybe she's assuming all five schools are ready to go right away, but my guess is that the school already has it and is waiting to submit it to the conference until tomorrow, which it has to do, at which point it would presumably become public anyway. That probably explains why she settled on tomorrow - any later and the cat's already out of the bag.

[2006alum]

From my understanding of the rules, the chosen school likely had to know she signed with them when she signed it:

You should sign your NLI in duplicate. Once you have signed it twice, retain one copy of the signed NLI for your records. You should send the other copy back to the institution. When the institution receives it, they are responsible for forwarding a copy to their conference office. The institution must file your NLI with its conference within 14 days after the date of final signature. If this filing deadline is not met, the letter will be declared invalid.

Since the final day of the early signing period was Nov. 14, the latest the conference could file it is tomorrow. Maybe she's assuming all five schools are ready to go right away, but my guess is that the school already has it and is waiting to submit it to the conference until tomorrow, which it has to do, at which point it would presumably become public anyway. That probably explains why she settled on tomorrow - any later and the cat's already out of the bag.