Has anyone tried this out and can say how long it takes?

The flowchart on the back-end looks pretty involved, needing to publish transactions on the chain and get confirmations. For Bitcoin, that takes upwards of like 15 minutes depending on what block depth the receiving party cares about and stuff. Even foregoing that and just listening for conflicting transactions being broadcast for a few seconds, that's an annoying delay to open a page. Not to mention dealing with the UI to authorize a specific payment for every damn page on paywalled news websites

It's pretty trivial to set up, here's a link to the docs: https://x402.gitbook.io/x402

Transactions confirm every 2 seconds on Base, and preconfirm even faster (every 200ms); there's no lag from a peer to peer payments perspective since they settle so quickly.

Through account abstraction and spend permissions, you also don't have to wait and authorize every single payment. It's a customizable from a developer perspective depending on how they want to build out their application.