[quote=IVIasterJay]
Since when do old men last long in Naruto, AU or not?
[/quote]

[url=http://naruto.wikia.com/wiki/%C5%8Cnoki]Well there's that one guy....[/url]

And if I recall correctly, Hiruzen was fairly old as well.

Not to mention Chiyo and stupidly old by the time he died Madara Uchiha.