It seems like those people applied for work permits not study permits.I saw quite a few people who applied in May sharing their good news about getting approvals. I don't know if any one of them have applied from the US. someone even said that they got approved without biometrics.
I applied in May as well but havent heard back yet.
https://www.canadavisa.com/canada-immigration-discussion-board/threads/post-graduate-work-permit-processing-time-pgwp.481328/page-660
They may have not given biometrics, but they probably got them from previous applications.