I have, and I agree - as a user AMP sites seem to be faster, at least the ones that I've noticed are AMP.
But I've also implemented AMP pages and as a developer they are a PITA. And as discussed in the OP and related they are definitely an of example Google crowd-sourcing their challenges onto everyone else.
Part of what makes AMP pages faster is that the AMP constraints force you to abandon not just ads but also many other complex HTML5/CSS/JS features. The resulting UX is less sexy and may be lacking in functionality, but there is simply less of it. Getting simple AMP pages from Google's cache _is__ noticeably faster on mobile, as much as I wish it wasn't.
But I've also implemented AMP pages and as a developer they are a PITA. And as discussed in the OP and related they are definitely an of example Google crowd-sourcing their challenges onto everyone else.
Part of what makes AMP pages faster is that the AMP constraints force you to abandon not just ads but also many other complex HTML5/CSS/JS features. The resulting UX is less sexy and may be lacking in functionality, but there is simply less of it. Getting simple AMP pages from Google's cache _is__ noticeably faster on mobile, as much as I wish it wasn't.