Thought i would share mine running on VMNG300 and Buffalo Infiniti N Router. My online gaming has been poor for months now and had a tech out the other day who tightened some screws on the splitter then left.
This one is from the day the tech came. The first red spike is when he unplugged the router and the second and third is when the 'area manager' called me and had me running some tests.
Said person told me my connection was "perfect" and there is no over utilisation on the line and also no noise. Sorry but to say its "perfect" is not something i would agree with.