I do. The numbers are a great way to tell the age without estimating in most cases. The only time I estimate is if the numbers are unclear, or the labels are somehow unreadable.
I agree it is very time consuming, and would rather not do it. I’ve found a little trick that helps sometimes. If I am dropping off a radon monitor a couple of days prior to the inspection, I get the numbers then, and have them already keyed into my report prior to showing up. This does two things… It speeds up my inspection on the day I am doing it, and it also lets me give my client the radon results the same day. (One I did earlier this week, I noticed a problem with the furnace when I got the numbers, and even had my comment already written and in place.)