I've lived here in market #11 for twelve years, and in that time I certainly have not seen anything of the sort.
The really big win in multicasting is for multi-network NPR operators. In most of the country (with the notable exception of Minnesota and Wisconsin), the second network is relegated to markedly inferior signals (e.g., WNYC 820 in New York). Multicasting gives these operators a chance to cover the same area as their primary (often class-B or class-C FM) signal with their second network -- and the listeners to those stations are often the ones who would be willing to ante up when the station offers IBOC radios as pledge premiums. If the IBOC take-up is substantial enough, in a decade or so they could sell off their second network to EMF or Calvary Chapel of Twin Falls.
Garrett A. Wollman | As the Constitution endures, persons in every snipped-for-privacy@csail.mit.edu | generation can invoke its principles in their own Opinions not those | search for greater freedom. of MIT or CSAIL. | - A. Kennedy, Lawrence v. Texas, 539 U.S. 558 (2003)