What is this turbo good for?

For what littel it is worth, thinking about this last night, I'll change my mind on what I said about this turbo being quick...it may be quick for a truck turbo but still takes 1-2 seconds to spool up and produce any real boost from idle....I drive an '07 CTD as my main driver. This is not nearly as quick as some turbos like the 16G Super on my rally car.....that turbo is 'on' in less than 1 sec.