Speeds on LW are shown in kilobytes which are larger than kilobits. So a d/load speed of 3763kbs = 470KBs and u/load of 708kbs = 88KBs. I have my d/load speed set at max. For the upload speed you should cut it back some. I have mine set 10KBs slower than the max. You need to save some bandwidth for overhead. You'll need to eperiment a little with the settings if you plan to do other things while your using LW or it could slow your computer down too much.
Your speeds are quite fast probably better than most
.