NBC’s coverage of the Olympics in Sochi is slipping in the ratings.

Sunday’s prime-time coverage delivered 21.1 million viewers and a 4.8 rating in the demo, down 9 percent in viewers and 19 percent in the demo from 2010 in Vancouver. That’s the lowest demo rating for this point in the Games in Winter Olympics history, though dodges being a low in total viewers.

Looking at NBC’s running average through Sunday, Sochi is lower than Vancouver Games by 12 percent in viewers and 15 percent in the demo. Coming in below Vancouver has been the trend so far, and is understandable given that the 2010 coverage was mostly live in U.S. prime-time. Yet now Sochi has edged below the last heavily tape-delayed Winter Olympics, Torino in 2006, down 3 percent the demo, with this year still retaining an edge in viewers.