The engine analyst that is the basis for this should have more sense than that. His premise is that a cold engine is richer by the fueling curve until it warms up which is true, but he takes it too far into saying that it fuel washing the cylinders clean of the lubrication thus creating premature wear.
This would be only the case if there was an excessive amount of unburnt fuel which isn't the case otherwise the engines would be way too rich to idle properly. Plugs would foul, O2 sensors would go bad, or other things in the case of diesels way before the cylinders would prematurely wear.
The evidence that he is full of crap is exactly what people are reporting here. Hundreds of thousands of miles on engines that were routinely warmed up "improperly" according to the analyst.
