While I agree that composition and general photographer skill is required for a great shot, and that there are many photographers with outdated gear producing amazing shots (something that happens naturally as you get to know your camera and spend a lot of time practicing), some technical aspects of the iPhone DO make a huge difference. For example its speed and amazing auto-focus can't compare to my iPhone4, and while I believe to be an "okay" amateur photographer, I know that I could do wonders with the new model.
Yeah, I think there's definitely an over-emphasis on hardware these days. People act like the new Canon 5D Mark 15.3 is the only way you can be a "pro" photographer, as if there's a mythical barrier that specs stamp on you. Yes, in certain areas, certain things are required: medium-format jumbo-megapixel cameras for huge department store fashion prints, for example. But my iPhone has been my primary camera for
years now, and they're starting to hold up for poster-sized prints (as rare as I do them) better & better with each new model. The fact is that most of us share our photos online (Flickr, Imgur, Facebook, etc.) where a lot of times people can't tell the different in quality between cameras. Even the video portion is making pretty good strides:
http://fugostudios.com/red-epic-iphone-4s-comparison/
My wife shoots a select few weddings every year; we use a Nikon D90 with Nikkor glass & my Canon T2i with vintage glass (60's-era Zeiss, plus an 11-16mm Tokina as needed) & haven't felt a strong enough need to upgrade to actually go out & purchase the D800 or anything yet. Some high-end photographer from B&H was at one wedding we were shooting & was talking down to me about how he'd never use anything other than full-frame for a wedding because it wasn't professional. I really had to bite my lip to keep him from asking why h
e wasn't shooting the wedding as he was a good friend of the bride & groom, and they had specifically requested us because they liked my wife's photography style It did feel insulting to have a quasi-pro act like that, but both my wife & I like our workflow, and *we* got the paycheck at the end of the day, so it worked out alright, haha.