I usually review right away too. If someone is going to give me an unfair bad review they usually do so regardless of when I submit my own review.
I’ve never had a bad unfair review and I’ve never expected one. I’ve very rarely (twice?) given one. So I’m completely spoiled in this regard. And if I do have to give one I want to hope that it appears on their profile right away so other hosts can be warned right away.
We have only gotten a couple but for one I knew it was coming because we clashed with the guests constantly throughout their stay for different reasons. Another one completely blindsided us when the guests were friendly but were not suited to sharing a space with hosts.