Time to crank the geek drive to maximum: I'm pretty sure that even in the old TNG technical manual (pre-first contact) it explains the star trails as being a side effect of the warp bubble effect, rather than an actual representation of stars passing by the spaceship. The writers knew that if the enterprise were really wooshing by that many stars that fast they could be outside the galaxy in a matter of hours (or minutes in some of those "we're in a hurry" shots).