I won't try to argue your point. All I'm saying is, as a lifelong radio-listening Chicagoan, Doo Wop was never in the mix as far as I knew. The two big powerhouse AM stations I listened to as a kid were both 50,000 watt "blow torches" that could be heard throughout the midwest–WLS AM 890 and WCFL AM 1000. They both played top 40 exclusively. Motown was big. Beatles/Stones were big. Local bands like the Buckinghams, Cryan Shames, Ides of March were big. Doo Wop was never played. Like I said, might have been a "before my time" thing, so I would have been totally unaware.