I haven't seen one, but I attended a talk only yesterday where the pro giving the presentation now shoots most landscapes with his iPhone and says he can print to A2 at sellable quality. I would prefer to believe him than many I see posting on the subject in many for a.
The problem here is that too many people spout nonsense based on side-by-side comparisons instead of 'how does the image look as an image'. Sometimes I think that an image taken with my 30D would be considered trash based on the theoretically calculated resolution.
I think many on CR consider sharpness and resolution the pinnacle of success and often the composition is not even given a second thought. This tends to be true when it comes to wildlife or maybe birds in particular because the shooter often, like me, really loves birds and just acquiring an image of some species gives a shiver down ones spine.
This has been pointed out to me over the last few years by a few of the big boys and I'm thankful for that. I now at least give some thought to basic principles, having read The Photographer's Eye a couple times, especially when it comes to cropping, which is almost a given when shooting birds.
Of course this is just me as a person who is coming with no formal training in photography. Reading some of my earliest posts to CR and the questions I was asking, would be rather embarrassing, so I don't do that.
Hmm, maybe I'm still displaying the same ignorance and I just don't realize it! Either way it gives me a laugh and I still enjoy photography for the fun of it.