We also had our interview on Jan 24 in Montreal and were handed over this form DS-5535 and resume and research publication docs as well, Visa Category IR5, and we submitted everything on Jan 25. I hardly see any IR5 in the Excel sheet of ds-5535. But there was a lady ahead of us, she also got this form, and she told us outside the embassy that her daughter and son both also got this form, but they got their visa in 58 days. Hard to believe.
So far, we got 3 date updates on ceac website.