Sprint has about 100Mhz of spectrum per market, which is technically enough to provide 1Gbps to each site (when 802.16m comes along in a couple years). Sprint won't provide that kind of performance to each user, but they'll have the spectrum to provide far more shared bandwidth than 3G. They'll be way ahead of 3G and be able to compete with cable/dsl with one big advantage... truly mobile data.
