I don't know if this is just me, but it also appears that scrolling is broken on the home page. (Chrome 59)

It's using one of those annoying "easing" libraries for scrolling. I kind of hate that they break perfectly good two-finger scrolling just so they can get an "special effect". There's one reason Natural Scrolling is called Natural Scrolling: the screen is supposed to reflect what your gesture means. "Easing" only works if you introduce it as an end-of-gesture effect, not if you have to "accelerate" into it.

The first time I encountered it I was kind of taken, thinking "okay, neat". Since then it only serves to annoy. I agree completely.

The only other case I like scroll hijacking is disabling it, or completely changing the behaviour (eg. horizontal parallax effects and other animations).