Board Thread:News and Announcements/@comment-26010916-20150521154101/@comment-1458758-20150521222213

I'm gonna say it's just a pun at this point, since his name is Bolt and all...

That's like if you named a character Wind cause they're a drifter and expect them to use a wind move just cause someone makes a blowing joke.

Don't get me wrong, there is so much symbolism in Naruto, I won't be surprised if he does have lightning release, but this doesn't seem in any way conclusive.