No, streaming video services aren't eating traditional TV's lunch.
That's according to a representative for HBO and Cinemax, whoas streaming services such as Netflix, Amazon Prime, and Hulu Plus were on the rise.
"The research is simply incorrect," said Jeff Cusson, a representative for HBO. Both pay-TV networks are owned by Time Warner.
The Los Angeles Times was the first to report the network's comments, which included similar statements from Showtime (a unit of CBS, which also owns CNET), and Starz.
HBO told CNET that both pay-TV networks have shown significant domestic subscriber growth over the past two years. Time Warner reported adding 1.9 million domestic subscribers to HBO and Cinemax in 2012, and expects similar numbers for 2013.
Likewise, Starz later responded to CNET and pointed out the strong subscriber growth of Starz and Encore.
The Hollywood Reporter noted that the NPD report no longer appears on NPD's Web site.
NPD has since issued a "data clarification," noting that while its study found the overall number of subscribers had declined, individual subscribers were signing up for more channels, or adding more channels over time.
"In that case, faithful premium channel subscribers are becoming more so - which would be consistent with the subscription increases being reported by individual channels," NPD said in a statement.
Updated at 2:55 p.m. PT: To include a statement from NPD.