Unanonanimity

As an Uberx driver myself, I do in fact look at the passenger rating. I take it seriously when I rate clients, and only on one occasion have I rated someone less than four stars. I won't accept a fare for someone below 4 stars, although I've only ever seen one person with that low a rating. You have to be pretty bad to not even warrant 4 stars.

I think the default is five stars...it drops from there. All of the five star passengers I've had, have only been using Uber a short time. It doesn't take much for the rating to drop from five.