Please prove me wrong, because I've heard this MS-Kyubbi thing for a while, and it's been bugging me. Also, the eternal part of the Mangekyou Sharingan was a metaphor; you lose your sight by over-using it, but by taking it from other Uchiha's, you'll gain eternal light" as in, you'll be able to see again. So please stop with the silly "EMS".
Oh and, in case someone mentions it, all Mangekyou Sharingans look different. Madara's Mangekyou was just more powerful than any other, just like Sasuke's is better than Obito's; there's no special part about it.