From which launch strategy did WHTZ Z100 quickly gain attention in New York?

They pulled off what I'd call a "blank slate" reset, flipping from a soft rock format to Top 40 without any warning or buildup, which was unheard of at the time. The magic was in the stunt - they went silent for hours, playing only a ticking clock and a countdown, then exploded with "Rock and Roll All Nite" by KISS at exactly 10 AM on August 2, 1983, creating this electric, rebellious buzz that perfectly captured the city's energy.