For the last three years, Netflix has accounted for a third of the Internet traffic zipping into North American homes every night. But Web video competitors like Amazon, HBO and Hulu all say they’re seeing significant growth. So is anyone cutting into Netflix’s lead? Not really, said Sandvine, the broadband service company that tracks Internet usage. A Sandvine report out this morning pegs Netflix’s share of prime-time “downstream” traffic delivered over “fixed networks” — that is, wires and pipes — at 32.3 percent. That’s just a hair down from the 33 percent estimate it provided last November. Meanwhile, Sandvine said Amazon and HBO have seen their share of traffic hold steady, as well. Sandvine said Amazon dropped from 1.75 percent to 1.31 percent, and that HBO dropped from 0.5 percent to 0.34 percent. But that’s not a lot of movement either way.
