to the point... I've gotten to where I can cut and be within an inch or less of the length I want. I started out years ago measuring 18 in with a tape measure and striping the log with my chain tool. I got so used to it that I don't even need to measure now. One year I had a guy buy 6 loads of oak but he had to have it less than 18 inches for his burner. We literally went through measuring one piece at a time to see if it was less than 18 in to get his 6 truck loads. It was a struggle let me tell you. From that point on, I started cutting my wood shorter and got to where I can cut less than 18 in consistently.
Now to add to my situation, I am cutting my OWB wood longer b/c I can burn 4 ft logs so I have to take into account what I am cutting for and I can generally get it the length I want without measuring. Practice has taken away the time of measuring. So to answer the question. I think we are all anal about our wood. lol