We must have been there at around the same time then! We came in delayed on OS (never again! - not because of the delay though), and are still waiting for our luggage to be delivered to our home..

If you are coming from the A/B/C side of the airport, then the first immigration hall has a fast track towards the right-hand side - but you have to cross over the tensa-barrier across the Thai lane from the Foreigner side, which was no problem. Some immigration people tried to scream at us, but I just held up the boarding pass showing Business class and kept walking - through with zero waiting time.