A Revised Zoom Test of my S9000:
Tripod, 2 Sec Timer, ISO 80, Aperture Priority f7.1, Exp Comp - 1/3.
Saved original images as Tiff and then made 100% crops of 1000 pixels wide, 2614 pixels high, saved as Jpegs. All crops from center of original images of 9 mp, Fine.
No post Processing at all: