Taunton press has published tests of 10 inch job site saws with numbers for blade run out, and actual performance. I don't remember if was in Fine Woodworking or Fine Home Building though.
Freygr makes a good point that the blade and how well the saw is tuned matters more for its accuracy than the market it's sold in.

FWIW, construction doesn't have to be sloppy or inaccurate. Recently I was doing some volunteer work framing walls at a facility owned by a major timber frame builder. Their walls are accurate to 1/16 inch.