I'm experiencing the same both on the website and using Jerboa like @Scoopta mentioned.

Edit: Noticed that they're taking donations now (they weren't a few months ago). Decided to throw a few dollars a month to help out. I encourage everyone to do the same 🙂

From time to time I experience extreme sluggishness and occasional timeouts in Jeroba so I don't believe it's only the website.

New to this instance, but for me too it is comparatively sluggish since I started using it yesterday.