And every one who has done that was awesome, right?
I'm sorry, but Glee is not a show that you should expect good actors to come from. Its not impossible, but his work to date combined with his age and how he looks he's definately not someone I have a lot of confidence in when it comes to playing Barry.
I'm not saying its not possible for him to be good, I'm saying every image I've seen of him makes him look like a stupid pretty boy and I can't imagine him being a guy who works with forensics. I want to be proven wrong, and I'll watch his arrow episodes with an open mind, but I won't be too surprised if his casting proves to suck and it ruins the chances of a flash TV show.