My experience is that the web app does not work perfectly. In fact I get an endless spinner >50% of the time and lord help me if I try to open a comment thread.
No kidding! I rarely look at Twitter, but if I do, in 50% of cases I have to refresh the page to get any content to show. I thought I was the only one.
Agreed. I rarely use Twitter anymore, but when I do, I use the mobile site, and it's awful in my experience. My phone is about 1.5 years old, but I don't think a website should struggle to load on a somewhat old phone.