People love Christmas music. A lot of people do. Because KOIT-FM jumped from third to first during the holiday season (from 4.3% in November to 8.1%) when it switched to all Christmas music. KGO-AM 810, which has been No. 1 since the Marconi era, fell to third. Remaining at No. 2 in both surveys was KCBS, which was likely bolstered by its FM signal (now just a year old). Here's a link to the Arbitron ratings at Radio-Info.com. And here's the usual disclaimer. Cumes are only beauty contest figures and they don't matter to advertisers. Advertisers buy time based on listenership in key demos, like women 18-49, etc.
Almost forgot the South Bay. KBAY-FM, which also switched to Christmas music, was No. 1 with 9.8%. But KBAY is often No. 1 in the South Bay. No surprise there. KOIT surged, going from 3.1 to 6.0.
When it comes to News and News/Talk in the South Bay, KCBS is tops (No. 3 overall) and next is KSFO (No. 7). No. 8 is KQED and ninth is KGO. KLIV 1590, San Jose's all news station, is 29th.