I believe they do and so do most of my clients. Why? 1) they show you’re interested, 2) they indicate you know the importance of follow through.
But please, don’t overdo it. Keep it basic – Thanks…. I’m interested…. I especially appreciated learning more about… – meaning mention something that actually happened in the interview. This should go without saying but it has to be correct – free of spelling and punctuation errors.
I’d love your opinion – do you believe thank you notes matter?