There's a distinct lack of Javascript, few (no?) images, and the CSS seems very light. That'll get you a long way right there.
[EDIT] for a similar "oh, I forgot the web could be this fast when we don't pile a ton of shit on top of it" experience, try Basic HTML gmail some time. Its full-page loads are (most of the time) much faster than AJAXy Gmail or Inbox. See also: craigslist.
Just had a conversation last night about SQLAlchemy support of NoSQL dialects like. I bet you didn't use a Model layer. Right? Is there anything you want to share in that regards?
I thought you and the other comments were exaggerating, but you're actually not. This feels impossibly fast from a user perspective. I'd love to see a write-up of this as well.
Never mind. The site loads now. I was a bit confused about the site. As in what kind of mentoring are the listed people providing. The HN link at the bottom helped getting a better picture: https://news.ycombinator.com/item?id=15148619
I'm in the opposite camp - personal side-projects are where you can safely implement the MVP and/or ruthlessly chop things/ideas that never* get used without people harassing you about bells and whistles.
It would be a big problem to support such a library. It's enough to have a Maven library to simplify the integration, though I'm not sure if it's available now. Or you can build a jar and use it - that's how you manage integrations in Java :)