Regardless of type, I was always taught to keep my hand on the gear handle until I got 3 green
What you were taught (and by whom?) and what is SOP, are often two entirely different things. So many items "taught" are personal opinion and not by the manufacturer.
My favourite beef are pilots (captains as well as copilots) who reach over and hold their hand on the gear lever at VR, waiting in breathless anticipation for the PF to ask for gear up. When queried, one co-pilot told me he had been "taught" that during his type rating in case there was an engine failure and the crew forgot to call for gear up.
