A little more than a year ago I did that test and scored ISFP.
Now just some days ago I gave it another shot and scored ENFJ - same as Colm OReilly.
I don't remember those numbers though. Quite a change though, only the Feeling part stayed the same.
About confidence...I dunno, I think I'm fairly confident...but as you see, I'm more a Feeler than a Thinker.