Up front, I'm not in the "cow" industry (that's a jab, but I'm not using jimlad).
I have a tie to the hippie/organic foods industry, but also have a gi-freaking-gantic skepticism of the HOLY SHAT WE'RE ALL GOING TO DIE RIGHT NOW axe grinding of some in that industry.
I make sausage (pork is what's for dinner a lot of times), I dabble in BBQ, I have cured bacon, etc. I'm not an expert in beef, but I'm a step or six above buying what's in the case at Wal-Mart. My 2c as an above normal (well, normal in Hawk country) consumer:
F-the injected meat. F it right in the A. When you can't brown stew meat because of the 'flavoring solution' cooking out, there's something wrong. If it says "enhanced with up to XX% flavoring solution"...put if back or throw it on the floor.
Corn is probably not the evil world ender that some believe.
Grass maybe isn't as good as some claim.
The absolute best flavored burger I ever had, bar none, was cooked by me from grass fed, local, sold out of the farmer's freezer in the shed as he brushed the cat off the counter and asked his 3 year old to have her mom get him a package out of the freezer in the basement. (ISU Grad BTW) Part of me thinks maybe it had the organs grinded with...might be where the flavor came from.
On the opposite side (corn fed), my local butcher has fed me some dang good meat as well. I'm certain it wasn't grass fed.
In the end, to me, if it's treated like a commodity, it's probably not going to be as good as if it's treated like FOOD. If it's raised by someone who cares about raising cattle, and processed by someone who cares about what they're cutting, and sold by someone who isn't figuring in what they can make in selling 'enhanced' meat, and cooked by someone who knows what they're doing, it's probably going to be pretty good. Anywhere along that chain, throw in someone who doesn't know or doesn't care, it can get screwed up.
Let's all have a burger in celebration.