I don't put anything past fast food places. I just think it would be weird for them to substitute a cheap meat with an expensive one. I'm not sure I understand why they would do that.
But on the subject, I pretty much stopped eating McD's with that pink slime article. Since then, I've eaten there 3 times and had the filet-o-fish meal each time. The other 2-3 times I had fast food, it was Wendy's. But at this point, I'm glad to say I have zero confidence in any public eateries, so my eating out is minimal. I'm even weaning myself slowly (very slowly....lol) off of prepared food items from the grocery store. That's gonna be a hard one because my pantry is full of stuff like Rice-a-Roni and Hamburger Helper. I'm really gonna start making my own stuff from scratch. I have absolutely no reason to trust any of these food making folks, and I need somebody to explain to me where all these new ailments and age-5 puberty cases are coming from.
With all that said, I doubt I'll ever give up McD's french fries. That's just going too far.