From Tom Taylor's NOW column yesterday...
Chicago suddenly has a real horse-race in the country format, with iHeart’s upstart “Big” WEBG (1.8-2.0-2.3) seriously pushing CBS Radio’s incumbent “US 99.5” WUSN (2.8-2.9-2.6). (But imagine what WUSN’s big shares used to look like - these are now both at relatively low levels.) The CBS station retains a sizable cume advantage (about 1.2 million versus about 930,000 for “Big”). But Chicago media savant Robert Feder says that despite having “very limited marketing behind it,” Big won the 25-54 demo. Starting at the top of the standings, CBS all-news WBBM/WCFS drops from first to second (6.5-6.4-5.8), below iHeart’s highly-consistent urban AC “V103” WVAZ (6.1-6.1-6.1). V103 is tied for first in middays and nights, and wins PM drive and weekends. WBBM is still #1 in mornings and tied for first in middays. After those two, it’s Hubbard with hot AC “Mix 101.9” WTMX (4.8-4.9-5.0) and iHeart’s top 40 “Kiss” WKSC (3.7-3.9-4.4). According to Chris Huff, that’s the largest share for Kiss since October ’14. Next is Cubs-boosted “Score” WSCR (3.2-4.2-4.1). It’s a steady month for Tribune’s talk WGN (4.3-3.7-3.6). It holds onto third place in mornings. With the Cubs at the Score and the White Sox at Cumulus talker WLS (2.0-2.2-1.9), Disney-owned/ESPN-run all-sports WMVP loses ground (2.0-1.9-1.4). The Windy City’s most popular station for weekly cume is CHR “Kiss” WKSC (2,375,400).