OK, that's just not fair... my 55-250 has never been, and will never be, that sharp. Are you sure you weren't using an L?
Can you post the settings for that shot?
iso 100, f/5.6, 1/320's @163mm
as for sharpening yes i did you software but it wasn't much, here's the image straight from the camera. and yes this painted person scared me as well ha.


















