The last report by Sandvine says that -in North America- Netflix accounts for 30% of traffic during prime time, and 22.2% of daily internet traffic. Sandvine gets the data from ISPs using its broadband technology and now foresees "Real-Time Entertainment" (which includes Netflix) shooting up over 55% of peak internet traffic by the end of this year.
Sandive also reported that in Europe, Real-Time Entertainment continues a steady climb, rising to 33.2% of peak aggregate traffic, up from 31.9% last fall. BitTorrent, a peer-to-peer (P2P) file sharing protocol, is the largest single component of both upstream (59.7%) and downstream (21.6%) Internet traffic during peak periods. In the UK, BBC's iPlayer is 6.6% of peak downstream traffic, reflecting the demand for localized content in many markets. Overall, individual subscribers in Europe consume twice the amount of data as North Americans.