Yeah, in 2022 they didn't use delegates and Poilievre won with 67% from several hundred thousand votes, but this time it was back to delegates again, as they did under Harper. Harper’s last win was 84% of 2,900 delegates. The exact number hasn't been released yet for this one I think, but estimates are 2,500 or so. Reporting is that 95% of delegates voted and 87.4% went for Poilievre. So, probably around 2,080 votes total for Poilievre.
That's why if you look at the coverage over the last few days, you'll read about Poilievre meeting with delegates behind the scenes in closed door meetings and trying to shore up votes. You're not doing that with hundreds of thousands of voters, but you can with such a small number deciding your future.
We'll probably get the exact numbers some time soon, but it'll be in that ballpark.