I do and I don't agree with what joel was saying,and I do remember hearing interviews of him saying that.
In a way however, I DO use the placeholder method when first constructing a track as I seem to usually start with a kick or bass.
For myself, I call it the auditioning stage. And since I mix on the go I tend to see how the kick chosen is going to gel. Especially since we all know that the potential of your mix changing as you progress with other sounds is great.
So, in a nutshell it isn't a placeholder,technically, if I am vibing on the kick melding with other lower frequencies. If I'm not, I will attempt to detune (or tune) or just use another.
As well, it depends on how tired my ears get of constantly listening to kicks or listening to the track with a insufficient tonality of the kick that I placed. Most of the time, my ADD "kicks" in (no pun intended)and I close the track..lol