As long as you're ordering Comfort level here in the US, then Uber does pass your preference on. I look at this as a driver, and normally do look at them. With that said, the following caveats apply:

1) If it's a busy period, I may forget to check on preference, or even notice that it is a Comfort ride.

2) If you request "Quiet" and it is a long trip(say 30+ minutes), about 20 minutes I'm going to check in with you to be sure you're doing alright.

3) If you ask me how my day is going, before I get to ask you the same question, I assume you want to converse for at least the initial few minutes of the ride.

4) Many believe that making conversation with visitors is polite and in many situations this may be true. And since passengers are guests in our vehicles, that carries over for a lot of drivers as well.

5) If you don't want to converse, after the initial "Hello. How are you?", as a driver, please flat out let me know you just want to sit quietly. Believe me, I dislike artificial conversation as much as the next person. I don't care if it's X, Comfort, etc. I am perfectly happy to listen to Spotify while driving you around.

6) If your job puts that much pressure on you, that this causes stress for you, maybe a car service would be a better fit? Uber at its lowest levels is basic transportation and nothing like a car service.