Craig Anderton's First Rule of Recording: "If it sounds good to you, it is."
Ask any noobs if something 'sounds good' and then ask a mixing engineer the same, and you'll be very surprised.
And the difference is this: the noob doesn't have any references to compare what he hears. The mixing engineer does. 'Sounding good' means
how it sounds compared to other sources. Otherwise you might just say: 'this rope is long.'. Long compared to
what?
Anderton just meant: 'don't be a total perfectionist, otherwise you'll be getting stuff done at the pace of a snail'. He didn't mean: 'You don't need to learn a thing: just trust your ears, because they surely are brilliant.'.
As for the original question, I still haven't seen an answer. It's quite simple: either the realtracks are raw recordings, or they are mix ready, meaning that at least they have no bad resonances, etc.
There's nothing wrong with them being raw recordings, if they are. We just want to know so that we can treat them as they need. My impression is that they are 'raw' but they don't contain bad resonances or spectral imbalances.
Then again, I am a musician, not really a mixing engineer.