Assuming the bike next to yours has a decent saddle on it. I think an extra 3-4 minutes it would take to get the bearings out of the bolts and break the piece of chain holding the saddle in place (theoretically) on my bike to walk away with a Thomson seatpost and Fizik saddle vs. the bike next to mine with an OEM saddle and post is going to be a no-brainer to most thieves.

I don't know how much you make per hour, but for most, $50 per minute (give or take) is a pretty big incentive.