If I run a ping plotter I can see some packet loss (occasionally) during some hops.
Also running it for a several minutes shows the odd ping variance spike.
Hence whilst my average pingplot is a solid 150 I have the odd spike during some of the hops at up to 250 even 300 plus.
The ingame net report does not show this. (but then I am not looking at it all the time). No one has comented on me warping.
Whilst its desirable to have the best of connections, its not always possible to change ISP easily.
So given the above what may be the occasional ingame penalty for sticking with my present ISP and his occasional lost packet and long ping spike.