Netflix captured 33% of prime-time web viewing based on internet traffic in September, eclipsing Amazon.com, Hulu and Time Warner’s HBO Go by a multiple of at least 18.

…The company’s share of peak internet viewing traffic has climbed from 20.6% in the second half of 2010, Sandvine said. It stood at 32.7% a year ago. By comparison, Amazon’s market share amounted to 1.75% in September, while Hulu garnered 1.38% and HBO Go had 0.52%, according to the study.