I have to side with the "internet hunters". Since I started deer hunting I've never had a deer do anything but drop on the spot. However, I don't take questionable shots, I don't take shots beyond my ability(and I practice enough to KNOW my ability), I don't shoot at moving targets, and I don't take shots at more than 100 yards. I'm patient, I'm steady, and I don't pull the trigger unless I'm absolutely certain I can kill the animal on the spot with a single shot. I also took the time to develop my skill as a shooter, and have worked hard to keep that skill in practice. I took the time to learn all I could about the anatomy of a deer. I choose my hunting bullets carefully. I load carefully, and test those loads constantly. So before some of you start accusing folk of lying, perhaps you should consider that there are a few of us that take the "quick, clean kill" VERY seriously. For me, it's a matter of practicality, I hunt in very thick bush, and I know if I don't kill it on the spot, I will have a very trying time tracking it down. That gives me very strong motivation to be very selective about the shots I take.
I've fired one shot for every deer I've yet taken, 100% of them went nowhere but down. that's a FACT. 100% isn't luck, it's a combination of knowing the physical structure of my prey, being patient, staying calm, and good shooting skill.
So instead of accusing folk of lying, perhaps you should look at yourself, and ask why have I not killed every deer on the spot. I've lived the proof that it is, in fact, possible to only take the shots that are lethal on the spot. It can be done, now get out there and do it.
oh yeah, my load of choice is Hornady's .358 250grn SP interlock powered by 48.5 grains of H4895