I was traveling around 30mph down a dirt road, and had one jump in fromt of me. I hit the brakes, and didn't even nick the deer. However, when the deer turned to run off, one of its hind legs kicked the front end of my car and broke a piece of plastic. That's the closest I've been to hitting one.
I have had (as have other members of my family) a lot of luck running our vehicles with deer alerts on the vehicles. Those of us that use them have never hit a deer (out of 9 people). I live in Michigan, and Michigan has the highest population of deer in the country (about 2.8 million deer in the state I think).
I was in the vehicle with my mother when she hit one...new vehicle and she had not purchased any deer alerts yet.
On another note, average cost of car repair from a car-deer collision would have to be close to $4,000. What are the chances insurance companies could put up a bounty for every deer harvested during deer season (legally)? Maybe $100-200? Or it could be more along the lines of a discount on your current insurance for every deer you harvest. I took 4 deer last season, so I saved insurance companies $16,000. The meat is just about gone too, so it may be 3 or 4 I'll take this season.