Comey is not stupid. I disagree with him on this issue, but he's one of the smartest dudes in government. And he has square iron balls.
With his declaration he's saying that he still needs special access to iPhones, and that in this case he was just lucky that someone had the tool to unlock an old iphone ready.
I'm not saying he's dumb, I was saying that the statement makes it clear how political this is, rather than an actual security issue. If he wanted anything more than to pressure tech companies into submitting to the whims of the government, they would have approached this issue quietly through back channels. If there was a threat that terrorists might actually benefit from hiding their tracks with newer phones, THAT would be dumb.
But more importantly, I don't think either of us are qualified to comment on the physical characteristics of his balls.