Since the last post, WETA has indeed gone all-classical.
Music listeners don't pledge? Bull. DCRTV.com notes that, according to a Wash. Post article, "WETA-FM [since flipping to classical] is now the 5th most listened-to station in the market. ...another public station, news/talk WAMU, shot from 3.6 percent in the fall to 4.3 percent of the listening audience from January to March, giving it a 6th place ranking among all local stations."
http://www.washingtonpost.com/wp-dyn/content/article/2007/06/04/AR2007060401707.html
Personally I would've preferred seeing WETA switch to triple-A, but oh well, I guess this might work better in that seemingly very conservative radio market.
Another argument in favor of non-comm music stations: WFMU, a small free-form music station in New Jersey, raises nearly a million dollars a year while doing only two weeks of on-air fundraising each year. They have a passionate music listenership.
I think the poster who argues that music listeners don't pledge just doesn't understand the appeal of really good music radio which exposes artists and genres never heard on commercial radio. Is he one of those overpaid public radio consultants who makes heaps of money telling these stations to flip to news/talk?