With regard to Sprint's network, yes it could be better. On the other hand, for me it would't matter all that much. Probably my favorite thing to do with my smartphone is to stream radio broadcasts. Some stations put out a good reliable stream, and others stutter, stop, and buffer constantly; the funny thing is, it doesn't seem to matter how good my connection is. I have cable internet service that provides download speeds in the 12 - 20 Mbps range, but even when using my device at home over this network, the "bad" stations stutter and stop and buffer just as they do when I try to stream them on the 3g or 4g network. Whether it'll work for you depends on your lifestyle.
ETA: even when streaming on my PC the weak stations are definitely still weak, just as they are on my mobile.