Hi Jeff, that's a tough question. There are so many variables that can affect your hatch rate. Everything from a person's incubating knowledge and skills, to what breed you're incubating, (some are easier to hatch than others) the age and condition of the eggs, whether they were shipped or not, power outages, how accurate your thermometer or hygrometer is, how humid your climate is, whether the room was drafty, on and on.
Some people get 100% hatches, some can barely get an egg to pip. I'm sure there are a lot more factors than the make and model of incubator.
I added a fan kit to my LG, and get more even temps now, so I don't have to worry about cold spots in the 'bator. And I added a turner, which makes life easier for me.
With shipped eggs, I have a poor hatch rate, with eggs from my own hens, it's pretty good. I have 2 dozen of mine in now, I can tell you a percentage in a couple of weeks.