I'm at Goldman this summer and come from a pure mathematics background (in an area that's not very quant-focused, by choice). The first part of the article is unequivocally true. Most in my area are incredibly interesting, diverse individuals with non-finance backgrounds.
I think it's somewhat fitting that these comments are made at the best university in China, however. It's emblematic of one of Goldman's recruiting challenges: those who have done interesting things prior to college, often continuing through college, may be less likely to get into top schools and if you aren't from a top college it's demonstrably harder to get your foot in the door with these summer internships.