Ok, I've been doing some research into this, and aside from having a better GPS chip, one of the things that the stand along GPS units, such as the Garmins, have that makes them better than the NIT for GPS locking, and allows them to lock on in only a matter of a few seconds is a rather neat system that I've unofficially called "GPS drift adjustment". Essentially what the GPS's do is, when they do their first time lock, it can take 2-10 minutes or more to get a full lock. After that it's just a few mere seconds.