My appointment was at around 16:00, got there early and they let me do it anyway. Got my results today at around 15:00 so less than 24h between testing and results.
There is a line in english that specifies it is a PCR test and it says Negative right next to it. Would recommend this place, although I'm not sure how much use it is now we're all at home. Or supposed to be at least.

When booking I had set motive as travel but ended up discovering I was a "cas contact" but this wasn't a problem as I wasn't asked at any moment. As for all covid tests, French citizens should have their carte vitale, EU citizens should have their European Health Insurance Card.