Just tried it, and the difference between Twitter native and Twitter PWA is night and day. The PWA has absolutely 0 polish. No animations, no transitions, nothing. The tab bar at the bottom misses hits if you tap quickly / right after the PWA opens. The pull-to-refresh doesn't use the native scroll physics. The search tab's tab bar horizontal scrolling can interfere / combine with the vertical scrolling, causing really funky interactions.

Does it browse twitter? Yes. Is it good? Well, maybe if all you ever uses are PWAs, this is considered "good."