How often do the odds makers "get it right"?

[youtalkfunny]

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I mean, is the opening line generally a good indication of what the superior odds makers feel the final score will be in a football game...?

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The day after the Packers/Patriots Super Bowl landed on the number:

MY MOTHER: How did you guys know the Patriots were gonna lose by exactly 14?

ME: Ma, this was Super Bowl 30. We were bound to get one right eventually.

(note my disdain for roman numerals.)

(That reminds me, I had that conversation with my mother via the pay phone at UMC in Las Vegas, where I had just called her to tell her, "It's a girl!", making me a Daddy for the first time, about 12 hours after a Super Bowl. That turn of events is a story for another time.)