If cold is 10 c then fine start and go but if cold is -10c or worse then the guy is full of it. When ice cold meets red hot bad things can happen and we all don't have the luxury of idling along until the car warms enough to bolt down the freeway or on a  highway at high speeds. Even punching it out onto a city street with heavy rush hour traffic with an ice cold engine is asking for problems. Sorry bucko but your advice does not apply in all circumstances. Maybe you're one of those guys that is lollygagging along the freeway  at rush hour causing chaos with everyone zipping  around you because you're gently warming your engine while sipping your mocha chino.