Tobi with his personality would have joked about being coped up in the hospital for so long though. Plus, in Naruto world, they have weird jutsus that would have probably healed Tobito in less than one day.
I totally disagree on this theory
yes Tobi does act like Obito and he does wear an orange object on his face BUT!
sure Tobi and Obito have a lot in common but con sider the facts and look at this manga scan and look at Tobi: http://hvo.typepad.com/photos/uncategorized/01_1.jpg look the same direction as Tobi and see what side that is it's his RIGHT NOT his LEFT! and he was crushed by BOULDERS AND ROCKS HOW COULD HE SURVIE IT!!I found this info on search.com (I don't put all my hope into this site because of all the fan references)
It's unknown if and how Obito would have become Tobi, but at the time of Obito's apparent death, Akatsuki had at least two members who were highly skilled at the preservation of a body's abilities after death; Orochimaru and Sasori. Fans speculate that if he is in fact Tobi, he could be the third Mangekyō Sharingan user that Itachi mentions
and no the third Mangekyō Sharingan user is a girl and Tobi is "a good BOY" but that arguement is for another time.
If Tobi was Obito--Masashi would have to do a hell of a lot of explaining.
Like...Tobi'd have atleast a half Sharigan, wouldn't he? What the hell's the deal with that?
Maybe manga artists don't know what will happen and didn't expect it to happen? After all, they just make up things, and draw whatever their boss tells them to do. Also, if Masashi WILL explain, it would be through the manga. (another chapter or to with Tobi explaining what happened to him after being smushed)
Most mangaka should have what they want lined up. All they need is the stuff inbetween---even if it means having characters they don't wanna' explain about that need to be.
At the moment--Naruto's losing tons of its original fans because Masashi either refuses to explain what the hell he's doing through his work--or it's just boring.
Tobi is a big thing in there--along with the Akatsuki leader. Hahah.