^^^well i think they were wrong.
The National Basketball Association and National Hockey League both formerly used best-of-five series, the NBA in its second round prior to the 1957–58 season, and in the first round from 1960–61 through 1966–67, and again from 1983–84 until lengthening it to best of seven starting in 2002–03, and the NHL for its first-round series beginning with the 1979–80 season and lasting until that league increased its first round to best-of-seven in 1986–87.