Yes, it's awful for me on Chrome 58. While I do need to update my browser, I tried on a couple of others and it seems much smoother on Firefox:

Chrome 58 OSX: extremely janky, but I do have lots of tabs open.

Chrome 61 Canary OSX: a little janky, but mostly ok. It's the only open tab.

Firefox 54 OSX: smooth scrolling. It's the only open tab.

Pretty slow for me on Linux Chrome 59. I think there's some JS trying to "smooth" the scrolling (or at least that's how it looks) and/or handling those scroll animations at the top/bottom of the page, but affecting scrolling everywhere.

Not on my phone (Android + Firefox.) I didn't check the desktop site yet.

Whats the browser your using?

Me too. Chrome 59 on a Mac.