Realistic baits will out fish non realistic baits probably at least 10 to 1 when it comes to big bass.
Here is the thing though. Many guys think a bait looks realistic to them because it has some details or a good paint job but it is still far from realistic. 99% of most cranks and similar baits are not realistic at all even though they may have a photo finish. They still look like a lure and not a fish. It would be like painting a picture of a Ferrari on the side of truck and expecting people to think its a Ferrari. No its still a truck. I will use the Huddleston as my example. Here is a bait that actually is realistic. Its looks like a trout. Its the correct SHAPE, SIZE, and COLOR. When bass eat that bait I am pretty sure they think they are eating a real trout. Its not a reaction bite. They are feeding. That bait is realistic and its results speak for themselves.
The biggest problem with this argument is guys comparing a regular crank bait to one with a realistic looking paint job. The truth is neither one of them is realistic at all so they produce similar results. If you want to debate the effectiveness of realism then choose a bait that looks like a real fish, swims like a real fish, is the correct size of that fish and realistic paint job. Then you will see how effective realistic lures can be. Consider this. I make a couple baits that are made for dead sticking. They just float on the surface, with none or very little action by the fisherman. They get bit by big bass based soley on their realism. Most bites are slow and deliberate. I have seen it many times, The bass will slowly swim to the front of the bait and eat it head first. The bait is not being worked. its just floating. Its the realism that fools those fish.
For all regular non realistic, non swimbait lures. I think that simple patterns work as well or better then a detailed finish.