Not for me on a 1080p 27-inch monitor from a reasonable distance. I have to browse Hacker News at 125%, and Reddit at 110% - although almost all other websites work fine.

I was referring to the default font size in browsers.

cmd+ cmd+ cmd+ cmd+ cmd+

oh yeah, you're right 9pt is very readable for me too.

Great for you! I am reading this comment at 16pt.