"Natural flavors" are made from plants or animals using old-fashioned processes. "Artificial flavors" are made from 1) plants or animals using newfangled processes or 2) icky substances such as petroleum or coal tar. "Natural strawberry flavor" is made from a tree (birch? willow? can't remember), not from strawberries.
I'm pretty sure I learned these factoids around ten years ago from a book called Mauve, about the history of fabric dyes, of all things. Or some of this might be found in Fast Food Nation.
BTW, my aroma memory tells me that if you slap on some Polo cologne, the scent that remains after a few hours is "blueberry flavor" from Betty Crocker muffin mix.
Natural Capitalism by Paul Hawken, Amory Lovins
The Ecology of Commerce by Paul Hawken (to a lesser extent)
http://news.ycombinator.com/item?id=369249
The article makes for a good read.
One thing I learned there is that if you buy a strawberry flavored something that lists "natural flavorings" on it, that doesn't mean it has any strawberry in it. "Natural" just means the material originates in nature, not that the actual molecules are natural. Material from corn chemically processed into something that tastes (barely) remininscent of strawberry is a "natural flavor" according to the system.