Gaming experience is dependent on your internet connection; some games use very little, but some are hogs that need a fast ADSL line.
Lord Of the Rings Online (LOTRO), uses a few KBytes per second, so in theory you could run it on an old dial up line; however, with a ~60GB file download for the Hi-Rex gfx option, it would take you until judgement day to download it on that line.
A low and stable ping is better than a fast, laggy connection; cheap ISPs tend to have very poor pings; you get what you pay for.