The only possibility of causing longer processing time is that maybe some of them are reviewing students' bridging work permits. It is the time they gradute from schools...
It's hard to say because I can't tell how many people from the spreadsheet near our dates/earlier than are still waiting for their OWP, and how many are N/A since they didn't apply. You know what I mean? For all I know I could be the only april 15 applicant on the spreadsheet that applied for an OWP. I kind of want to call them and see but I'm wondering if they even have more info than I have