IMO, most are definitely not that good, at least, not on stuff like this. And as a general rule, most bookies will simply try to balance their action.
With something like this, where the market is really small, LV books typically just set prices that are laughably bad and only take relatively small bets.
By doing that, they feel extremely confident bettors are the ones taking a bad price (Nyquist 8/1? Is he even money to start the race? If he does start the race, isn\'t he going to be 12/1, at least?), even though they don\'t know what the right price actually is.
Contrast this with something like March Madness, or the Superbowl, where the market is massive, and they are good at handicapping the event itself. With those events, if they manage to open a bad line, they can correct and balance out their action over time to get to a position they\'re ok with, because the markets are so big.