I don't know what line of work you are in, but this is decidedly not true in mine. It's skewed toward candidates making an excellent first impression but then failing, instead of the other way around.
Gotcha. I think I was mostly objecting to the first several words of your comment saying an interview is decided in the first several seconds :-)
I'm familiar with that feeling though. I've had several interviews where I really (subjectively) liked the candidate, and really wanted them to succeed - but having a prepared interview plan ended up doing its job and helped determine that the candidate was not a good match for the role.
