Does the length of message affect the distance or chances for message to get through?

As being discussed in another thread:

So today when we say 4 hops, that counts the end-points, so to speak. As discussed in various other threads, the hop count is increasing soon! We’re currently in dev and will soon move into real-world testing to see just how ready for primetime (i.e. a firmware/app update) this is. Wish us luck!