That’s what some of you are saying. I heard that myth years and years ago that an engine with iron heads and block you needed to set the cold lash .002-.004 LOOSE cold. If you do that, when you get to operating temperature the lash will be looser than what you want.
Any engine when started will have the valves grow (take up some lash) when they first start because they see all the combustion heat. The block and heads don’t grow as fast because of the amount of mass you’re heating. Plus the coolant.
So yeah, they may get a bit quieter on start up with some heat but when everything is hot the lash will be looser than what you were shooting for.