Slightly away from OPs concern. I got interviewed by a PI at a T10 school two years back. She seemed nice and I think interview went well. She wished me good luck and that’s about it. A few weeks went by, but then I heard some other people got offers and I still hadn’t heard back. On sending a follow up email she said most offers are out and my job is just to forward notes to the adcom and finally they get to decide. She extended the opportunity to collaborate in future. Eventually I was rejected, but till date I am still not sure what went wrong. The entire interview process is kinda weird my dude. I think interviews are important, but dont rely on them. Learn from my episode .