I know what you mean. He's like Nigel Kennedy in some ways, I reckon. Safe and sterile really, but desperate to ingratiate himself wherever possible. Bigging up hip-hop and street culture at the drop of a hat, yet doing very little to back up such apparent inspiration and influence.
I actually bought a Jamie Cullem CD from a charity shop a few months back and really wish I hadn't. I'm looking at it right now. It's called 'Catching Tales' and is to be avoided with as much will and resolve as Hauschka's be sought out. My tastes, though - so probably won't sit well with many folk. Still, as we all (well, most of us) agree this is not the forum for those of closed minds, is it?
I don't even know any of his music, so have no reason to actually criticise him. You're right, this isn't (or shouldn't be) a forum for those with closed ears, but in this case I'll have to admit to them! Odd thing, but sometimes the mere name or something will put me off to the extent that I'll actually avoid them. Sometimes an image of them would do the same thing.