I gotta say I'm not sure about this. I know if I start my truck when it's cold, it will idle on its own at 750 rpm's or so. After a couple of minutes, it kicks up to 1,000 rpm's. This may sound naive but to me, the logical only good thing this would be for is if you're jump starting another vehicle and don't want to sit in the truck revving the engine. The idea of using this feature when the truck/oil is cold presents problems, considering the injectors run off oil pressure. Again, experience with my '05 only, I know if I start that thing cold, it sounds like it's about to come un-zeused from its home and come out from under the hood so I certainly wouldn't be revving that thing when cold (which most would try to do the heat the truck/warm the engine up faster.
I'm an aircraft mechanic by trade and we have a number of engine related limitations that are based on oil temperatures and for a reason. I would think the same about a diesel engine that works off oil pressure.
Does any of that make sense??