IGN.COM
The popularity of intercooling is such that most stock turbocharged systems run some sort of intercooler. Like turbos, the proper sizing of the intercooler, especially its core, is important.
Of course, the dimensions of a unit affect its ability to cool charged air, with cores that have more surface area with less depth have more efficiency than those that are shorter and "fatter". In addition, there is also the consideration of a phenomenon of "pressure drop".
This is most notable when an intercooler that is too large is matched up with a turbo that is on the smaller side. (and this isn't a reflection of Ty's manhood)
In order to properly pressurize the air in the system, the turbo must work harder to "fill" a larger intercooler than a smaller one. This leads to increased turbo lag and turbo wear.