Someone correct me if I'm wrong, but it seems like Final Jeopardy automatically takes the CPU 1:25 to complete. This makes sense since there don't appear to be any variables in Final Jeopardy, everyone just enters their answers, you find out if they're right, and the winner is declared. So if you're shooting for a record or best time you can figure out what you're going to get at the end of Double Jeopardy and save yourself a minute and a half.
Another thought, what would happen if there was a tie?
Just discovered, if a player has less than or equal to $0 going into Final Jeopardy, they don't participate. The time is then 1:05, saving 20 seconds. The eventual WR probably needs that to happen to be a really solid time. I'd imagine you would save another 20 seconds if only 1 player did Final Jeopardy, but that's likely extremely improbable.
If there is a tie, they have to answer a tie-breaker question, adding time and probably ruining the run. That would be horrible luck.
True, except not Final Jeopardy. I think it's either 0:45 with 1 contestant (I have yet to witness this), 1:05 with 2 contestants (confirmed), and 1:25 with 3 contestants (confirmed), no matter what.