The main issue is not the speed at which data is travelling, even if you have a 512kbps connection it is sufficient to get a decent transfer speed for games. The issue is how long it takes your signal to get from you to the other end, this is know as lag and can be measured with a special command known as a ping. The higher the ping rate the greater the lag, and this delay would allow someone's player to appear to vanish and then reappear elsewhere. In gaming when the lag is quite high you end up seeing only echoes of where the player once was, rather than the actual players position in relation to your own. If it's this try and find a player that's a little closer to you geographically, though I'm not sure if you can do this with PES.
Take a look at
Speedtest to get a rough idea of how much lag there is between you and your ISP, then run the test using a location further away to see how the lag/ping changes.