Why is a six year graduation rate being normalized?

[ucbalumnus]

@Novacat9191

I do think the 6 years gives you a good barometer on % of students that start that actually earn their diploma. Personally, I found that for students looking at schools outside the top tier it is a good indicator (along with Freshman retention rate) of how well the school supports students that might be struggling.

Graduation rates mostly reflect admission selectivity and student financial capability to afford college. So what would be more useful in this respect would be graduation rates in comparison to graduation rates that one would expect from colleges with the same student academic and financial demographics.