I have not had my Xbox drop below 70fps based on my tv usually around 80-110 and as high as 120. That is with heavy buildings and clouds and lights. Over NY or at Manchester airport.
So I guess an average of 35-55fps with everything full is decent on Xbox.
So you are saying that VRR in order to smooth things out runs faster to compensate. Which is what we see on the tv meter.
Interesting… I guess I will do some reading today. Any sites for good info you would recommend?