I wouldn't really consider Cook to be a Daughtry wanna-be because that's not really fair to David. That's like saying that David A is a Clay Aiken or Anthony Ferdorov wanna-be or Syesha is a Fantasia,Tamyra Gray,Jennifer Hudson, Latoya London, Lakisha Jones or Melinda Doolittle wanna-be. Just because someone has a similar style as someone else, it doesn't make them a wanna-be. In 7 seasons, with all of the contestants they've had, everyone's bound to sound like someone (except maybe Jason. I have to give him that). So, no, I don't consider Cook to be a Daughtry wanna-be. I do think he was inspired by him, though. Daughtry was the one who made it cool for a Rocker to go on American Idol and opened doors for Cook and others like him. But it doesn't mean Cook is just trying to copy him. But even if he is, imitation is the most sincere form of flattery, so,if anything, it's a compliment to Daughtry.
PS I still don't want Cook to win, though, because, like Daughtry, I think he'd have a much better career without the stigma of being the American Idol. But I do want him to come in second place.