They found that there is indeed a set of users who download a whole lot: “The top 1% of data consumers…account for 20% of the overall consumption.” But half of these “Very Heavy consumers” are doing so on plans that give them only 3Mbps, as opposed to the highest tier of this particular ISP, which is 6Mbps. So, even with their heavy consumption, their bandwidth usage is already limited. Further, if you look at who is using the most bandwidth during peak hours, 85.3% of the bandwidth is being used by those are not Very Heavy users.
Oops. Downloaders are not bandwidth hogs.