Here as well.
I updated Chrome to 67.0.3396.79 (Official Build) (64-bit) last night just before playing and like everyone else. The swing meter is fine but everything else (sans commercials) is very choppy.
I just tried Microsoft Edge 42.17134.1.0, with same results. Maybe a tick better but not smooth by any stretch.
Firefox 60.0.2 (64-bit) exhibits same.
I'm on a wired connection with gigabyte internet, I always have 900+ up and down)
My friend that I was playing with reported no issues, he was using Chrome Version 66.0.3359.181 (Official Build) (64-bit)
It certainly does affect the overall game enjoyability, I hope they can figure out what is going on soon.
It all was smooth before last night.