equivalent as we speak. About 1,000 cars receive it per day with many more to come in the near future. With more cars, and data, that level 4 will become more and more solid until it gets certified as a level 4, and eventually become level 5 on any road in the country (including dirt roads and roads without markers).
Right now Waymo is in select premapped areas with ideal weather. They struggle in inclement weather.