>>>I have a friend who loves WCBS in New York...and wonders why WBZ never (during the day anyway) aired CBS at the top of the hour.
I suppose BZ thought it was more important to have someone locally reading what was important to local listeners at the top of the hour, than have a guy reading headlines from New York.<<<
It's a tradition that has lasted to this day. The former Westinghouse-owned stations have not aired CBS News on the hour (except late nights) since they originally never aired any network news. In NYC, WCBS carries CBS News while WINS does not. In LA, KNX carries CBS News while KFWB did not, when it was still a CBS all-news station. KYW in Philadelphia never airs CBS News. Same for WBZ (except overnight) since both had been former Group W stations.