Recent quotes:

Mobile Page Speed Benchmarks, by Vertical, in 2018 - Marketing Charts

The good news? Average page load speeds have improved from last year. The bad news? They’re still not fast enough.

Official Google Webmaster Central Blog: Using page speed in mobile search ranking

Today we’re announcing that starting in July 2018, page speed will be a ranking factor for mobile searches. The “Speed Update,” as we’re calling it, will only affect pages that deliver the slowest experience to users and will only affect a small percentage of queries. It applies the same standard to all pages, regardless of the technology used to build the page. The intent of the search query is still a very strong signal, so a slow page may still rank highly if it has great, relevant content.

How Google's Search Chief Has Been Living The "Mobile First" Life For Over A Year

I think the biggest realization that I am having is that the compute model of web on one side and apps on the other side, neither is kind of perfect. That’s the biggest realization I’ve had. Because the web still hasn’t been fully designed for mobile.

Mobilegeddon 6 Months Later: 5 Tips for Smart Astronauts

For those who thought that they could just sit back and relax in their non-mobile-friendly sites, there is, however, some bad news -after 6 months, the effects of Mobilegeddon are indeed starting to be felt.

Forget about the mobile internet — Benedict Evans

Mobile is not a subset of the internet anymore, that you use only if you're waiting for a coffee or don't have a PC in front of you - it's becoming the main way that people use the internet. […] It's time to invert that mental model - there is not the 'mobile internet' and the internet. Rather, if anything, it's the internet and the 'desktop internet'