Just checked my Slick City's out and they're not more than 1mm out of round. True seems to be within 1mm also, measured from centerline to crests and troughs. Of course my rim isn't that true or round so the tire could be perfect for all I know.

And yeah, if you're not stoked about the Schwalbes take 'em back. Shoot some video of how out of true/round they are if they ask any questions.