So, what kind of person would give a department like Stanford or Berkeley less than a 5? It's clear that everybody agrees that these departments are top 8, and we see that those schools almost always get 5s. Only someone with strong personal vendetta against these schools would give them a 1-4 rather than 5. Put three of these people together, and suddenly a school drops 4-5 spots in ranking.
Please allow finer choices. There's no way you can accurately rank schools at the top extreme with a scale where 98% of people would put the highest score possible for all these programs.