After reading this thread, I realized that the person that made it has an unchanging opinion despite what anyone said. That being said this response is meant for anyone that sees to understand what a raider really thinks about this subject.
Do I have the NIM mounts? No not yet. My group is very close to killing Brontes atm and will do so over the next couple weeks. When I see someone on Fleet that is riding a NIM mount, I get excited to see that people have cleared these bosses. I find that the way ops are today is just too easy. I have seen SM ops 3 manned and we have run 1 Tank 6 DPS and 1 Heal through Hardmodes with our heals not even paying attention and steamrolled it. At the end of the day these mounts are visible achievements that people did something difficult.
I have wanted the wings a long time just like the creator of this thread but if it meant I never even get them, I would not want a chance of them dropping in SM/HM. With what little NIM community is left will dwindle down to nothing if this happens.