First let me say, I really like Greg Ayres, and this isn't a knock against him, but he just can't pull off 14. His voice didn't fit the image of the character and I kept getting this 20 something vibe from Yukio when I watched the show. This is a pet peeve of mine, I really hate when they make boys either sound like they're adults or 20 something women. Hopefully at some point Funimation will start casting actual boys for the roles, or get actors and actresses that can pull it off. For now most are few and far between (the original Full Metal Alchemist being the exception). I honestly think it's one of the reasons people watch the subs instead of the dubs for a lot of shows.