I find different info in different parts of their website
SU admission is not rolling. According to the admission website, if you apply EA, your decision will be mailed out on December 21st. My son is freshman at SU. Last year, the decision was mailed out on December 23rd and he received it after Christmas. It looks like there is a good chance students will get it by Christmas this year.
@Hagiograph Seattle U portal was updated today with a decision!