Not being a musician in the least, I'll say the opening notes of "Baby It's You", "Only Yesterday" , "Make It Easy on Yourself (1980) "and "Ordinary Fool" have that same wow factor impact on me as "Dance".
Absolutely! And measure the similarities - For instance, John Bettis mentioned in the interview I did with him about how the opening word after in "Only Yesterday" has almost a sawtooth wave pattern for that very reason. In order to get the most out of that low E flat, it had to be written that way as this was tailored to Karen's voice. Jump up just a step-and-a-half to the opening note in "Dance In The Old-Fashioned Way" and you have virtually the same effect.