We are (not so patiently) waiting for Squarespace to give us a timeline/update on when they are going to speed the backend up. They have said they are working on it, but Google is dropping a big update in just a few short weeks. In this update pagespeed is going to be a larger ranking factor then before so....
Pretty much all you can do is optimize images and video uploads, remove any JavaScript that you added, and everything is is untouchable by us.
Personally this is very frustrating for me and my clients!
