although the lines took forever, didnt realize till it was too late that a non-Asean person could use any lane and not only the ones marked for Foreigners.

But Ive waited alot longer at LHR when I didnt have Fast Track or it was closed already. And Ive waited way longer at many US Gateways

Departure took < 5 mins

I guess its best to arrive very late at night and leave very early in the morn, the place was empty during those times