Originally posted by Oldschool Hmmm. I'm a little skeptical of those reviews because a) they didn't really send in enough different pictures to make a really thorough comparison (and over time to see if results vary) and b) the top three sites listed are all actually Snapfish -- in 2nd place, Snapfish itself, and then the other two sites (York Photo and Clark Photo) are clearly members of the Snapfish affiliate program (which means, different-colored front-ends but Snapfish actually does the printing).
This second point is really easy to discover, first because the sites all share the same basic design, but second because if you right-click on an image on one of the sites (any of the graphics used in the page layout) and look where it's coming from, you'll see that it loads from static.snapfish.com. They're not really trying to hide it -- which is fine from the site's point of view, but shows that the reviewers didn't use their powers of observation where it counts.
It's also worth noting that all of the photos from these three places had the same yellow color cast, although apparently the reviewers found that a good thing.
I'm not saying Snapfish is necessarily bad, nor anything bad about these two affiliates. Just, y'know, maybe some further research is warranted.