Remember that some of these pictures used may be fake (altered). He is, without a doubt, wearing a lot of concealers in his hair. However, when the hair gets as thin as some of the earlier pictures posted indicate, not even concealers have an effect anymore. In any case, he looks much better with concealers than he did as a balding man.
I also feel that he made a mistake by admitting that he had a HT. On one hand, it has created awareness and perhaps helped alleviate some of the negative stigma that has followed the hair transplant industry for so many years. On the other hand, the media has been absolutely ruthless about his baldness and hair transplant (essentially lambasting it ever chance it got). As if his own perception of his hair loss wasn't enough, he must now be reminded of it by the media. Poor bloke.