Originally Posted by
msm2000uk
I seem to recall a member of crew once telling me that the Main Deck doors cannot be opened until the jetty is attached to the Upper Deck - so I'd imagine sitting upstairs would be better for a quick dash to T5.
Similar to my understanding, I was told upper deck jetty connected then lower but they open the lower deck first to allow First passengers off.
That was certainly my experience in my few trips, upstairs in CW I've been off around the same time as some Y passengers ( I made assumptions, big school parties, etc) on the lower deck. At immigration in SFO there were a lot of people ahead of me for it only to be F and CW.
In 4A I was first off after the upper deck jetty was connected then lower deck.
Personally I would choose lower deck close to 2L for a quick exit.