Hi there -
First and foremost, congrats on this huge accomplishment -- getting a GSB interview invite is an achievement in and of itself.
I know it's tough, but try not to worry about your interview. Many interviewers across all MBA programs choose to not repond to thank-you notes because they don't want to give applicants false hope.
Especially when it's an alum who doesn't ultimately make the final decision.
I had a client a few years ago who had a stellar interview at GSB -- it went on for like 1.5 hours and her interviewer loved her and told her she would give her a glowing recommendation based on their chat. Ultimately this client didn't get in that year. She worked with me to reapply again the next year and called me sobbing after her interview, saying that her alum was short and uninterested and that it had been totally awkward and horrible and she wanted to call the adcom about it because she was positive she wasn't going to get in now. I told her to NOT do that and to just see what happens because the interview truly is not a make or break thing -- it's just another data point for the adcom. She DID get in that year, which proves this point.
So if they want you, they want you. While your interviewer may have had a poker face, that doesn't mean she's going to say anything negative about you... and even if she did, I'm not so sure that would sway the adcom if they were sold on you in the first place -- they know that alum interviews are all different, and they may even know that specific alum is particularly tough.
I hope that helps put your mind at rest. Best of luck and please let us know how it turns out!
john9922
Had my interview last Wednesday with an alumni. She got into the questions right away after a 10-second introduction, and I am really not sure how it went. She is a C-level exec and it was evident she was very distanced and detached. In total the interview was around 45 minutes. I sent a thank you note the same evening and didn't get a reply. Anyone else with interview experiences so far?