I assume we're all different

I personally like to use the lounge to relax, and sit down enjoying some food and drink. If it's less then 30 minutes till the boarding time printed on my BP, I probably wouldn't bother - well, unless there's a delay.

Actually, I once had a flight from T5B. After a few hours in GC South, they announced the gate about an hour before departure. When I arrived at T5B, it was less than 20 minutes till boarding, so I simply waited at the gate.

Well, that's me