So is building native mobile a better experience as far as response time is concerned?
To answer your question, it depends on the type of response time you're asking. If you mean simply button click event fire type responses, then yes native app development is superior. But like I stated if you wa t your app to be truly write once run anywhere, JS web apps are the way to go.....these days at least.
That being said, I only had one go at React and another brief stint with Android app development. I found them both to be complete messes. Maybe I'm so used to my last job doing C# Winforms, but I haven't found a more comfortable experience.