A The ratio is real.
Frame-by-frame video of tour professionals — from Hogan to Nicklaus to Woods — shows elite swings share an elapsed-time signature: the backswing takes about three times as long as the downswing. Measured on 30fps video, one of the canonical tour tempos is 24 frames back, 8 frames down. That’s where we live.
John Novosel, Tour Tempo (Doubleday, 2004). A Yale physics study (Grober & Cholewicki, 2006) found the same ~3:1 average with club sensors.