Dude, I lived there, and listened to 93.1 doing an all-talk format sometime after 1968 on my brother's stereo. The format may have only lasted a year or two, but it sure made the FM dial come alive.
Nope. WJBK was a simulcast of the AM at 1500 kHz, and it partially simulcast the AM country briefly until Storer started selling FMs as George did not see a future in them and feared FCC action for owners with an AM, FM and TV in the same market. Bartell bought the station from Storer along with FMs in Miami. Separately they bought one in St Louis specifically to do Top 40, and all three were inaugurated in close proximity.
Here is an ad for AM & FM WDEE from February 1970, indicating it was still country on both bands then.
The sale of WDEE from Storer to Bartell was announced in February 1971 and closed on March 15 per Broadcasting. Storer also sold their Miami FM to Bartell, and changed calls to WMYQ.
The news interval, which was very brief, was a filler to, apparently, allow Bartell to synchronize the Top 40 launches. You could almost call it a stunt. The give-away on this was the synchronized "Q" call letters that "copied" the San Diego AM 1170 "Q" name.
Here is an ad from the brief talk interval from Broadcasting in October 1971
That format lasted less than a year, at which point Bartell launched FM Top 40 in all three new markets rather close together. Don Barrett, who was PD and GM, had been McLendon's national PD for a while and his experience was based in... you got it... Top 40.
A blessed career of being a disc jockey, program director, national program director for legendary Gordon McLendon, and eventual general manager of WDRQ and W4 in Detroit and then launching KIQQ (K-100) in Los Angeles made dreams come true.
The "Q" naming concept, incorrectly called a "format" in nearly-always-wrong-Wikipedia, was simply a very clean Top 40 with fast delivery and very little chatter. WDRQ began Top 40 at the end of April of 1972.