Yah, I think I hurt the tire guy's feelings in a little town in Alaska. I asked him to only start the lug nuts and said that I'd finish them by hand. He assured me their impact wrenches wouldn't over tighten them and asked if I'd ever had a problem with a shop using an impact wrench. Well, I gave him a couple of examples and he let me do up my own lug nuts.
The only slight problem with using the term breaker bar is that in 1/2" drive I have 3 lengths, 13", 17" and 19" (and a piece of pipe to make it longer if needed
) But, in general, if the handles over a foot long and you put just as much force into it as you can it usually works out just fine.