IIRC, in the design guidelines longer animations should be limited to context switches, where anything under two seconds is "acceptable speed" and anything under half a second is "fast".
There's no need to use the most extreme animations for minor actions in the interface, and the linked page is obviously a showcase, not a real application.
Hello, thanks. I see lot of people would prefer what you're asking, and actually the Material Design specs are not followed very well by me regarding the animations. If you'd be so kind to open an issue on the GitHub page I'll be happy to assign a priority to it and work on it when I find some time.
There's no need to use the most extreme animations for minor actions in the interface, and the linked page is obviously a showcase, not a real application.