The users browsing the AMP results may never feel compelled to scroll down to see non AMP results.
So a publisher's choice isn't: "standard size for faster delivery", it's: "use AMP or receive less traffic than you're currently receiving"
That said, I find myself clicking AMP articles 5x more than non-AMP news links because I know the AMP articles will be fast and clean.
I'm still surprised so many people here are using google and not duckduckgo. I use the duck all day long. I used to revert to google when I couldn't find when I want, but I've found in the last six months, if it's not on ddg, it's not going to be on google, either!
We don't have to support google. Let's just stop giving them everything for free. People sneer at using Yahoo for mail, but what is the problem, really? It's almost all aesthetic.
Why give away our power and beg google to throw away profit and treat us right?
Persuade your friends to use other email and search providers. Design your websites so they have Links sections your visitors can navigate instead of going back to google. That's what I do and it works.