Confirmed! I interviewed for a job right after arriving in NY. The interview went incredibly well, and I went home and immediately wrote a thank you letter and put it in the mail. I had a super good feeling about this interview.
I didn’t get the job.
However, a few weeks later, I was called in to interview with another editor in the same company, and I did get that job. I found out later from the initial editor (the one who didn’t hire me) that he had planned to offer me the job, but since I didn’t follow up with a thank you letter, he assumed I didn’t really want it. He offered the job to another contender–but when he got my letter in the mail shortly after the offer had already been made, he went to HR and gave me a glowing recommendation. It was based on that recommendation that I got called in for the second interview.
So: send an email thank you immediately (same day!) after the interview. If you’re feeling extra, go ahead and send a written one too. OR go immediately to a coffee shop, write the letter, and return to the office and give it to the secretary.
Either way, those letters are important.