Depending on how close you are to a Gravity Well affects the acceleration away from a signal source you popped into to look at. If it is close to a Planet, for example, it will (upon entering Super Cruise) take some time to get up to a decent speed. If, however, the nearest Gravity Well was a long way off the acceleration is far greater.
All true and yes I'm aware. I'm saying if those acceleration and deceleration rates were higher, it'd make investigation of signal sources less of a troublesome proposition when traveling in SC.
You want to get to the destination, it's a long way, so you don't want to have to spend all that acceleration time over again, so you just ignore the signal sources (which is the stuff to do while traveling in SC)
If you weren't as bothered about stopping and starting (because it didn't take ages) that could resolve the "SC is boring" issue that some people have. (Only some, because a lot of people would just say that the signal sources "aren't worth it anyway")