This article references a study that indicated the following, which was timed to follow Howard Stern’s announcement about his impending departure to Satellite:
Between October 2004 and March 2005, broadcast radio received only 9 percent in media coverage and Internet radio a mere 7 percent. Coverage on Sirius, on the other hand, dwarfed those numbers with 46 percent. While XM trailed Sirius slightly at 38 percent (allegedly for not signing anyone with the same allure as Stern), that number represented a spike for the company in media attention.
Radio’s “share of voice” was 15% before the Stern announcement ande only 8% after. Satellite’s was 59% before and 84% after.
This scuffle in the PR war has two winners, and both are Satellite radio.