Barcli said:
Any arrival now has over an hour ( if your lucky) before passengers dissembark
I know T4 is not great at the mo, with all the emphasis is on the move to T5, but I think the above statement is a bit sweeping!
Apart from days of major disruption, due to weather, security etc, I can't say I've ever had to wait over an hour to disembark my passengers (And that's over 16 years of T4 ops).