I don't judge the age of the car, I judge the condition. Sounds like it was the suspension that bothered you, or else maybe you were hoping for a "Black car".
I was torn on if I should drop my rating when heading to the airport in Vegas. The guy was hustling and friendly but there was something up with his car for sure. He was babying his transmission (in and out of neutral constantly which doesn't help fuel economy on ATs) and it made an unholy racket accelerating (which could have been a bad exhaust like a missing or modded muffler). But he had no check engine light, and he drove safely, so I still gave him 5*. I've seen worse in yellow cabs.