I just flew back in J HKG-JFK via YVR. I have to say the crew's attitude difference is very significant. There are already a number of reports that complains about the US-based crews, and my guess is the YVR-JFK part is manned by US-based crews.

Anyway, from HKG-YVR the crews are amazing. Always smiling, polite to a fault, and go above and beyond to make sure you get everything you wanted, if not more. One even apologize why she couldn't serve coffee to me with the fasten seat-belt light on and she literally talked for 2-3 minutes in her apologies. I was taken aback by that. I asked them are they HK-based crew and they say yes.

Then the YVR-JFK flight. Immediately I notice an attitude shift. No smiles, indifferent business-like tone and service. To be fair it's not like they are bad or horrific, but compared to HKG-YVR it is just the gulf of experience is so wide that it's worth mentioning.