Thanks everyone for your responses.

Ugh.

I dropped out of the Number Two Job prospect. The headhunter made it into an ugly mess...which leads me to believe that I was at least seriously in consideration.

I am SO relieved.

The prospect of the homework, on top of my current high-pressure job, and preparing for the job that I really do want.....was too much.

I am looking forward to getting some sleep tonight.

I believe it is true that it's hard if not impossible to know if we will be a good fit until we're in the position for a while, but for once in my life I trusted my instincts and acted accordingly.

At least I took some kind of action. Sometimes it's good to push off the shore, even if you need to make midcourse corrections as you go....

Thanks, everyone