Exactly, modern android flagships are at par or better than Iphone when it comes to touch latency. Most people who express the sentiment "OMG iphone is so smooth" went from $200 Moto G to $1000 Iphone X. Compare in the same class, and you will find that both OSes are comparable.

Not sure how you got that from the link. The iPhone devices have 20%+ lower latency.

That link is old. There are similar measurements for modern devices available on many review websites. This link does identify the correct metric that people seem to respond to when they feel a phone is "faster".