Absolutely not! I believe he made them smaller (they were probably originally 1920x1088) perhaps to make it easier to host them all. BUT, anytime you modify them you re-encode them which changes them. The encoder very well could handle a clean picture better than one that already has artifacts -- and those with artifacts could likely have those artifacts get disproportionately exaggerated in the re-encoding process. Strictly speaking, we'd need a couple original RAW or TIFF images from his capture tool (and I am curious to know what he is using too) to really do an accurate comparison.
Ok, fair enough. Maybe he'll produce it.