My sister graduated from Wazzu with a perfect 4.0 GPA, Summa Cum Laude and is a 5th grade teacher making about $40K/year. She spent every waking moment completing her assignments to get those coveted “A’s”. I graduated with a 3.3 GPA in civil engineering which includes 2 “D’s” and never stayed awake past 9:00, had a wife, paid child support, and house and car payments and a job (no student loans) and now make 3 times her pay/year.
Therefore I think their study is flawed
My brother (much older than me) was Valedictorian at WSU and co-founded and sold a defense consulting company for tens of million$. I did no such thing.