No, while this was once true, this is no longer true at all. You should know exactly what team you will be working on before you ever get an offer.

This is also not entirely accurate. I got my offer a good 5 months before I even knew which teams I had a chance to speak with before the allocation process, let alone before I knew which team I would be placed on.

That agrees with my experience. I got team information yesterday and expect an offer today.

My advice is reach out to the team and talk to the engineers on the team. Even meet up with them for a Google lunch.

This is the best way to align everyone's expectations.