You know, I actually agree somewhat. I almost noted that I was having trouble finding more reliable sources, particularly concerning vegetarianism and veganism in the USA, but thought that would have completely torpedoed my argument. ;)

More seriously: the "environmental" claim rang hollow to me, so I set out in search of some facts, and I think what I found supports that intuition, but the burden of proof is not really mine. (I will retract my "it's animal ethics yo" statement—clearly a reach.)