Core: Some procedures aren't established yet. Basic safety - like only using manoeuvring thrusters (as opposed to the main sublight drive) to get you out of a comparatively confined area like spacedock - are presumably considered so routine that they aen't mentioned. Besides, if you used impulse to get out of dock - and I'm assuming you don't hit something - the backwash from the engines will probably damage the dock...
DonKarnage: It seems weird because it isn't te case. Earth has been using warp-capable ships for about a hundred years. The NX-01 is the first one to be capable of Warp 5. Most civilian vessels can probably only make Warp 3, with some faster military ships perhaps making 4 or 4.5. If I remmeber my warp scale correctly, Enterprise is therefore probably about 100 times as fast as most Earth civilian vessels of the same period.