I uploaded a video of the phenomenon on YT. What it shows is a much lower variance of FPS when disconnected and high variance (left tail) while connected. The visual result is a very noticeable degree of stutter. I showed myself banking near the end both connected and disconnected to illustrate the choppiness along the horizon. I do not have a VSProTrafficRelay.ini (only shows .bak file in that folder)
https://www.youtube.com/watch?v=jttPkgi21Rk