I don't care. (Don't tell Mother Honda I said that, please!) As long as I have been driving vehicles, I've always started moving slowly within 30-45 seconds of starting the engine. I accelerate slowly and don't move anything very fast. My theory, for what it's worth, is that sitting while the engine runs only warms up the engine and everything in the drive train and suspension needs to start getting warmed and loosened up. No evidence in 50+ years that my approach has ever damaged anything.
So there.
So there.