Not my experience at all.
Lived in Alliance for 5 years, went to Rapid/Black Hillls often, have relatives there and elsewhere West River. Many Husker fans in that area, in my opinion.
More factually, I spent my early childhood in Ainsworth, and much of my extended family still lives in the KBR (Keya Paha, Brown, Rock) area. Winner was our default station growing up in Ainsworth. Also, prior to the advent of satellite radio, when we traveled back to the grandparents, we switched over to Magic 93 between O'Neill and Atkinson as we lost the Norfolk stations.