I have a client in a managed office, and part of that service is the provision of internet, with static IPs for all desktops provided by the building, (I know it's a recipe to have all your data stolen, and you not even know!). They insist on saying that traffic is not managed, but we have different bandwidth available on different sockets.

Two desktops have blisteringly fast internet, and the rest have dodgy crappy internet access.

Is there anyway that I can prove that the traffic is being shaped, so that I can convince the powers that be to bring networking inhouse?