I'm going to have to disagree a little with this claim. If you are an artist, let's talk. Initially, it does seem pretty basic. I can't evaluate the lighting/shadowing at this poor resolution, but I'd hope it's more than a quick hack job (and it seems to be accurate/professional).
Even very simple icons for in-house applications have been known to take several hours, and you'd never know because the end product is just, say, a check mark with a halo around it. "Anyone could do that in 30 seconds."
A good artist, like any other professional, makes everything look effortless and easy, like the work took form in a moment. A good application, like iMovie, makes it look like you're an artist, so you can do in a few minutes what real professionals meticulously create over hours or days.