The “Holiday book” covering December 10-January 6 caught Chicago’s soft AC “Lite” WLIT-FM with a cume of nearly two million on Christmas Eve. While the Salt Lake City PPM report says the online holiday-music stream of AC “FM100” KSFI rose to nearly 10,000 in age 6+ daily cume, starting the week after Thanksgiving. Arbitron executive Bill Rose and Beth Webb told today’s online Client Update that the company is particularly pleased with the gains in metrics such as the in-tab. The rate for persons 6+ rose 9% over the Holiday Book for the year-earlier 2008 (to 78.3). The in-tab for hard-to-find 18-34s grew 20%, to 73.