My battery never drain fast and i'm using 5s iOS 7.0.4 jailbroken device.. in my opinion of any device it'll not drain fast unless you have alot of apps running in the background or using too much wedgets and tools.. i used BB, android and iOS i think they all the same..
Pretty much the samer story for me as cyber though i never used anything besides ios ^^
But as long as i don't have to much apps open then i never got my battery empty before 10pm
Though in the story they say it dsnt work like that