Define "better than expected", 'cause I already said where my expectations are at (which I feel are reasonable &, honestly, pretty damn good). Are we talking best-selling Pokémon game to date? That would require long legs after launch, which likely won't happen thanks to Gen 8 coming next year.
A ton of people were hand-waving this game and putting all hopes on Smash for Switch to cross that much talked about 20 million second year sales goal. There definitely has been an underlying narrative that this Pokemon release doesn't really matter much and it's all about Gen 8.