Obviously, there's many other factors at play. SEO is a complicated world, especially in such a crowded place as song lyrics. Though I noticed Google actually has an inline box for lyrics now which avoids the issue entirely.
Yes, there are many factors, and I clearly don't know all of them. I definitely see the problem that Google's inline (or amp) is trying to solve, but I think encouraging the right sites to grow to the top is a much better solution.
And by construction, AMP pages are easy to analyze without having to execute anything.
(disclaimer: I work at Google, and used to work on Search)
In no way was I dissing Google's crawl or crawl team. I'm just handing out conservative advice for website owners.
(disclaimer: blekko Founder/CTO. Nice to meet you.)
Imagine if Google rewarded plain old websites the same way they reward AMP sites. You'd have sites gaming the system by hiding ads and disabling web fonts just to get ranked higher, then taking a crap on "real" users visiting the site.
AMP is a standard for creating fast / jank-free web sites, which all search engines can implement freely. Google is spearheading the effort because nobody else did, but they're not monopolizing it. Everyone is free to contribute.
Everyone is free to follow, but they don't accept contributions. That is monopolising.
Here is actual data: https://github.com/ampproject/amphtml/graphs/contributors AMP currently has 275 contributors (people whose code was merged) on its open source project. Lets aim high and say 50 of them work for Google (probably a bit less), that leaves about 225 other contributors.
On SERPs, both the "flash" icon and the AMP carousel are AMP-exclusive which suggests that Google is abusing its market power.