It's strange because Cork were expecting a decision by close of play yesterday. If he's had the medical then what's the hold-up? He needs to get back into training and meet his new teammates. I'd be surprised if Hull haven't announced this by later this evening.
How can anyone criticise him if he chooses to join Hull City now? They have a proven manager, they've brought in some decent players in this window and should be safe this season. They've also got a few Irish faces at the club too, so in many ways it's the perfect destination for him.