That's the theory of real space - I don't believe that holds true for Elite though... Perhaps one to try?
Although I do know a commander who super-cruised to a near neighborouring star and that "quasi worked" - that is, the star and planets were physically there, but not being drawn on the screen. I guess ED only loads the drawable objects for a system when jumping out of Hyperspace, and has no mechanism to reload if you just travel the long way.
What Ian is saying is you don't, in theory at least, need to follow somebody's wake to meet them in normal space as the game does its dynamic instancing thing even in normal space. You could drop at just the right place and the game would instance you with them . Although considering the lack of points of reference and the fact the lowest speed in supercruise is 30km/s, you'd need a lot of time and effort to manage it even if you knew the player was there in normal space. You could also slowboat there in normal with enough patience and life support (assuming the player isn't sitting in the sphere of influence of a planet orbitting a good few km/s wrt its parent while you're stuck outside that SOI flying at your ship's max speed of a few hundred m/s).
The whole slowboating into a
different system is something else, in that each system is its own room and the game wont load content (stars, planets, NPCs, players etc) pertaining to a different system on the fly. It only does if you're hyperspacing there.