The reason it surprised me is it leaves YYT
after midnight and at one point (maybe 2-3 years ago) when it was mooted that they'd use a 330 it was an issue that the YYT
airport fire service was too poorly staffed after that time to allow use of such a large capacity aircraft. Perhaps that has been surmounted/changed.
I have been on that flight on absolutely packed 767-300s ... the market is def. there for the 330, albiet seasonal, especially considering the freight, e.g. huge ocean bouys and oil drilling eqpt., that I have seen being stuffed into the belly at LHR
. Its a nice quick crossing...as little as 4 hours eastbound with a strong winter jetstream push.