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One thing I think it's unfair to include 4 year graduation rate when it comes to ranking (by USNWR for example) Stanford because Stanford students tend to take off time to do other stuff before graduating. When it comes to top colleges, I don't know why this factor should be important.
The second area they mislead is the type of environment, we know from students at these campuses, that some of the selective ones are competitive, maybe cutthroat and are stressful.