Pre-M10 Admissions Offers?

We applied to a school with rolling admissions and got a call today saying they were waiting on one more thing (Principal recommendation) before they could call us with “good news”. I’m still trying not to read into it, but it sounds positive to me.

Can schools see if you applied to other schools if you go through SAO? Lizardkid did indicate the calling school was his first choice in his interview, but he panicked and felt the need to send in a few more applications over break. It seemed a weird coincidence we got the call right after we did the applications.