EI-EIDW - re your post on the 21st. Do you have any recollection of how EI handled the YYZ flight after its aircraft was reallocated to 103? Or was 103's fixed in time for on-time/not completely outrageously delayed departure? These don't seem like great numbers and reflect the delays I experienced when taking 128/129 in the winter.
It operated but around 4.5 hours late, the 752's going tech like that since they commenced EI op's is very very rare.
Part of the problem with the outbound punctuality is it generally uses gate 421/423 which stands were specifically aligned to handle 3 752's together and the last US 752 is at 12.55 however it's can be delayed often for a whole string of reasons if that flight is departing upstarts at those gates. It does changes gates which help but to be honest don't do a lot, late connections play a small role also.
Just one of those flights that's schedule is very tight, IAD is also s tight schedule.
Air Canada have been poor this year also, lunchtime flight regularly delayed and a lot more than EI.