Verse 1 in Genesis says "In the beginning God created the heaven and the earth."
But pay special attention to verse 2: "And the earth was without form, and void, and darkness was upon the face of the deep." Now how long did this last? One day? Unlikely, since "days" didn't exist yet. A thousand years? A billion? It doesn't say. How long did God let this planet sit there before actually putting something on it?
Another interesting thing is that we find that water already existed on earth. God's actual creation of water is never mentioned. Clearly this planet was a turbulent, violent, uninhabitable planet for a very long time before God chose to put life on it.
The first day doesn't start until the end of verse 5. So from 1-4, you may be talking about a span of millions or even billions of years as God, taking His time, creates the Sun, the stars (light), chooses THIS planet to put life on, and then slowly moves this world into a place where it can begin orbiting the sun (to make living conditions suitable for us).
Yes those are good points. Personally I spend zero time trying to interpret the introduction to Genesis. It's a waste of time. God spent very little time on it in His word so it must not have been important to Him that we understand it fully.
I don't know if it would be classified as "pcottrauxology." It's basically HughRossology. : ) This view is held by many. I don't accept oldearthism, as it is only needed for evolution to occur. The fact that a carbon-14 isotope will completely decay in ~100,000 years seems to disprove the notion of an old earth.