Tuesday, January 24, 2012 - 9:00am
Most pureplay webcasters enjoyed significant growth over the holiday season, according to Triton Digital's Webcast Metrics for December 2011, while most broadcasters declined month-to-month. The growth is likely somewhat attributable to the influx of holiday listeners.
Pandora yet again extended its dominating lead over others in the Top 20 Domestic Mon-Sun 6a-12m daypart ranker. Its AAS increased over 88,000 from November, a 10% growth.
Pandora is now close to surpassing an AAS (Average Active Sessions, which is essentially equivalent to AQH — i.e., average simultaneous listeners) of 1 million in the Domestic Mon-Sun 6a-12m daypart ranker. (Pandora surpassed the 1 million AAS mark in November 2011 in the Domestic Mon-Fri 6am-8pm ranker.)
Pureplay webcaster AccuRadio (brought to by the same folks who write RAIN every day) showed the largest month-to-month rate of growth at 29%.
(The chart above shows the growth of Pandora, CBS, Clear Channel, the top 5 terrestrial radio groups and Slacker from September 2009 through December 2011. Note that Pandora's AAS numbers from December 2010 through mid-August 2011 were affected by the omission of tracking code in some of its mobile apps. Click to view in full size.)
Slacker grew 7% over November, reaching an AAS of 50,767. That's up 96% from December 2010.
Meanwhile, Clear Channel was one of few broadcasters who grew over November, reaching an AAS of 123,427 (monthly growth of 5%). Other broadcasters dropped from November, some significantly: CBS was down 8%, ESPN Radio 9%, Cumulus 13% and Entercom 24%.
Overall, the combined AAS of pureplay webcasters increased 10% from November to December 2011, while that of broadcasters decreased 4%.
You can find the Domestic and All Streams Mon-Sun 6a-12m rankings below. Find out more from Triton Digital’s Webcast Metrics report here (PDF) and find our coverage of November 2011’s ratings here.

