I was helping my old man do some heroics on Taris a few days ago, 55 people in the zone. I saw a group of guys talking about characters they have. One guy said pretty much this and his highest level was 26 on Nar Shaddaa, I asked him what his /played was, he responded with something like 8 days and some odd hours. I thought to myself if there are a lot of people playing this way it explains a lot of the numbers in the higher planets.
Edit: for cell phone auto correct.