VM get worse and worse sadly on their marketing.
Some years back the ASA slapped them on their claims they good for gaming when they not.
Now they actually name one of their packages vivid gamer 200 when they pretty much the worst isp for gamers.
However it seems VM are making this for gamers this time on the basis you can download games quickly with the high burst speeds and the generous upload speeds wont impede streaming the game play. So they putting a different angle on it this time.
If jitter is important for you then switch to a dsl isp.