I'm in the middle of a 13 night stay at 2 Park Hyatts and 1 Alila in China. The full buffet breakfasts are spectacular and definitely no one in China is cutting back benefits.
At this PH, they have grilled steak, cherries, eggs Benedict, French toast, blueberries and giant coconuts. My wife just called it one of the best breakfasts she's had. And the hours are until 11am
I can't comment on the US but China is maintaining standards 100%.