I am flying tonight (in about 9 hours), I checked in and the upgrade list currently shows me as #3 out of 11 on the list.

It also says that seat availability is 6 in First and 12 in Coach.

Do I read this correctly: unless more than 3 people with higher priority check in between now and tonight, I will get upgraded?

Does this mean I won't be cleared until I am at the gate or is it still possible I will be cleared before heading to the airport?