You should do both. Actually speeding up the experience is great, and today even popular apps often reload data unnecessarily and generally work suboptimally i

You should do both. Actually speeding up the experience is great, and today even popular apps often reload data unnecessarily and generally work suboptimally in the presence of a slow or flaky connection. But there's only so much you can do - if the user's connection is bad enough, eventually they're going to have to wait. So you do what you can to make the experience more bearable.