(Just skip theWZA's obligatory JayZ's laugh post.)
It's really bloody awful, isn't it? He has the posh voice but he still sounds incredibly young, like he's about to make a high-pitched squeal of a laugh at all these frightfully quaint commoners around him. If he could sound a bit vulnerable or something he could get away with it in a Hugh Grant sort of a way but right now it's not happening.
For his sake I hope he gets a bit of gravitas to him soon.