Comment by DANK_YACHT

I went to a mid-tier school. The low-tier Harvard students are assuredly smarter than the top-tier students from my school. One reason is that students don't exist in a vacuum. Your peers influence your intelligence. Being surrounded by smart people, i.e. people with novel and interesting ideas, makes you smarter. The second reason is that the choice to go to Harvard is itself a smart choice. So people who make that choice are likely smarter than those who don't make that choice. I was in the top-tier of my school. The first time I was exposed to people from top-tier universities is when I entered the industry. I was absolutely blown away by the quality difference. The experience permanently readjusted by aptitude scale.