Have you seen the methodology for NPS (Net Promoter Score)? From what I can tell this is kind of similar. I'm not the biggest fan of that methodology either but there is some logic to it.
They are trying to classify via strong reactions. If you are in 1 0-6 range you are negative, 7-8 you are neutral on a issue and can be discarded. 99-10 is positive. Most people will give a 7 for "don't care but don't want to offend the person asking" surveys. More critical people (like me) will give a 5 but generally that's the way it works.
For NPS the theory is if you are in the middle you aren't really a loyal customer, you are ambivalent. It's the same for this from what I can tell.
Imagine surveying a scientist customer base with that methodology ... exactly what I had to do in previous role.
A scientist is usually a person would change they survey form if they could. You can imagine how they rate things in surveys.