I agree with Uberdude here. And I would like to add that since ALL joseki involve some division of territory and influence, the results can only be judged in light of the board position and follow-up moves.
In the example above and on most board positions at the stage where this joseki would be played, Black would have to gear his strategy towards making use of his amazing thickness and gain from it. White's counter-strategy should then be to prevent Black from doing so. That's the thrust and parry of Go.
It may seem like a lot of work (and a scary prosepect) to give up profit and have to get compensation through making use of your thickness in subsequent play, but once you learn the processes involved, you might find yourself largely preferring Black in some cases.
Making judicious use of Black's sente, which must be counted as part and parcel of the relative value of this sequence, Black can either quickly or slowly gain more than White has from the exchange.
was played as a probe and after 
white tenukied. Later black really wants to build up the top, and seeing this white comes back and plays 
. The exchange of 
The two stones' aji came in handy too.
