To begin with, they don't sound anything like Smashing Pumpkins, although that's not what people are getting at when they make the comparison. They're talking about OK Go making it big. Major label big.
Radio play big.
Bigger than Disturbed big. Granted, the symmetry is kind of neat, what with OK Go stepping into the spotlight as the Pumpkins are leaving. Go's sound is a good deal different than anything you'll hear on mainstream radio at the moment. Barenaked Ladies come close. And so the only thing to do is judge them on the merits of their records and live shows.