I experience this with Primal (both mobile and web), but not on Ditto or Nostrudel (web). The latter two are much speedier for me at loading, and Ditto lets me see my feed without re-posts (I turn it on and off), while nostrudel uploads media much more quickly for me. I like Primal for its UI bring nearly the same as Twitter, which I don't miss but got used to the UI. I also like Primal for the ability to see more stuff (like who quoted a note, etc.), but it is definitely slower.