Dunno that. Comments welcome. My view based on being personally delayed 3 times in two months, my occasional review of the IOM arrivals/departures web page during this period and the clear disruption yesterday and today (2 delays and 1 canx in less than 48 hours). But hopefully not tomorrow, when I go home...
(I'd have thought you'd have appreciated my reference to Q400 reliabilty, Cloud1 !!)