Just my tuppence ha'penny: I only fly BA LHR-ABZ on average every 3 weeks or so. However, probably about 50% of flights are delayed (sometimes to my advantage when I get on an earlier flight that's been delayed).
The big question is why have BA got rid of the scone with clotted cream and jam and replaced it with the "all day deli", alternatively called a sarnie in a bag?
GwynM