Looks like touches trigger 2 touch ripple animations: instantly and then with a 300ms delay again. Easily reproducible by visiting the documentation page with an iOS device: http://material-ui.com/#/components/buttons

I'm not sure if Android devices are also affected. Any available workaround for this?