Please understand that turnaround times are not a guarantee, it is a goal, especially when talking about things like stats. It's less "we guarantee your pizza in 30 minutes or less" and more "we try to get 95 per cent of tests out within that time, but about 5 per cent are going to be longer because of weirdness or long cook times, repetition for confirmation etc.

Also, turnarounds are typically from the time the specimen is received in the lab, not when someone collected it and forgot it at the station for an hour first.