Yes, the time's not the test, it's getting the sample from where its collected to the lab (e.g. a doctors office that may only get collected from once a day), a

Yes, the time's not the test, it's getting the sample from where its collected to the lab (e.g. a doctors office that may only get collected from once a day), assembling a batch, running it, collating the results and sending them back out. Any batch-oriented, industrial-scale testing operation will suffer the same delays regardless of the actual process.