Every estimate says years. They have 160 centrifuges. It takes 16000 to make significant enough quantities for weapons. They're sabre rattling, as their conservative government is unpopular, and trying to find a boogeyman to hang their hat on. (Sound familiar? When's the last time you heard a threat level update from DHS?) That doesn't mean that they should be ignored. Talk is what is needed, I think everyone's just puffing their chest before the negotiations begin. I sincerely hope I'm right.
North Korea is the real deal, they're frickin' crazy.