Back in April '14, Sprint said that "To more fairly allocate network resources in times of congestion, customers falling within the top 5% of data users may be prioritized below other customers" (see "Sprint's Reasonable Network Management Practices - Fairness, Limit top 5%, Video Optimization" - here).
It turns out that now, with the FCC' New Net Neutrality rules becoming effective, this is no longer necessary! (or fines like AT&T $100M [here] may cause more damage) - and now the Sprint congestion management "relies on Sprint’s hardware vendors".
Lance Whitney reports to CNET that "Sprint has stopped its data-throttling policy now that new Net neutrality rules are in place, the Wall Street Journal reported Thursday.
.. Sprint acknowledged the halt to its data throttling in a statement sent to CNET:
'For less than a year, Sprint used a network management practice that applied only at the level of individual congested cell sites, and only for as long as congestion existed. At such sites, we temporarily allocated resources away from the top 5 percent of heaviest users and to the 95 percent of users with normal usage, to try to allocate the effects of congestion more fairly. Once congestion at the site passed, the limitation automatically ended. Upon review, and to ensure that our practices are consistent with the FCC's net neutrality rules, we determined that the network management technique was not needed to ensure a quality experience for the majority of customers'".
Sprint's updated "Open Internet Information" page (here) says: "Sprint employs a holistic approach to managing congestion on its data network. Sprint’s first goal is to avoid congestion altogether by directing traffic to the best available spectrum resources and cell sites. Sprint also attempts to avoid congestion by managing tonnage on its network. Finally, when congestion does occur, meaning that the demand on a particular sector temporarily exceeds the ability of that sector to meet the demand, Sprint relies on the radio scheduling software provided by Sprint’s hardware vendors to allocate resources to user"
See "Sprint stops data throttling in wake of new Net neutrality rules" - here.