Not necessarily. Most of the test are done in "batches" in what is considered a "routine" fashion. This usually entails anywhere from 24 hours to 7 days, depending on testing and more importantly viability of the sample.
Usually, anything nasopharyngeal is done as STAT on labs, and from what I have seen thus far, the testing is very similar to that of the Flu, so a very short incubation in a warm block at most then easily tested with a strip. Other cases with PCR, the testing can take up to 2 hours since you got to incubate then do the reaction. Obviously the amounts vs ability to test also would add time to this.
Independently of those factors, and as an fyi for all of you, the tests are not good at what they do, so take them with a grain of salt.
As far as quarantines, in most states all they do is tell you to self quarantine in case of a positive qualitative test for 14 days, so I doubt the Gunt would pay all that money and then cuck at the last mins with any sense of egalitarianism towards others around him.
So if he has it and can test positive now, he has been contagious for quite a few days, so we may have a Gunt Plague Saga in our hands at that point.
Sorry for the medical 'tisms, I do not mean to derail the thread simply explain some of the shit that labs and others do with this "pandemic".