I believe it comes from a saying that most wear is in the first ten minutes of driving.

Which I also believe assumes you don't "wait for the car to warm up"

That saying. I still find some truth to it. While modern cars can adjust fuel mixture to different conditions. There still is an unavoidable few minutes where the engine runs in an open loop and wear is greater.

That said, in my vehicle when I listen for the engine to "close" it happens in less than 5 minutes.