Something that most people don't think about is the size of the unit. I am in a pediatric facility and we have units of all sizes. The smaller the unit, the more vulnerable it will be to temperature change. There is also the issue of the time the unit is out being made into an aliquot, and the fact that, in most institutions, the processing into an aliquot will be done close to the time of issue. So if you have an aliquot that is close to RT when it is issued, and then it comes back, what do you do? I think the only way to adhere to the spirit of the regulation is to measure the temperature directly. However, in that case, you are going to see your rate of expired units go up.
There are no easy answers here, and in my experience, most inspectors know this, and many of them do not pursue it too vigourously.