hi, one of the makers of Spool here. Thanks for kicking the tires on it. Now that our coverage is up, we are optimizing for speed now, so those wait times will come down.
I dont know how to contact you/message you on HN but there's one thing that has gotten a little annoying on spool; when you get to the bottom of the article - it brings up a big spool banner and this gets in the way of finishing up reading the article. I'm not sure if this is a bug or a feature but it's a little annoying :-/