I agree, something doesn't add up - I think the P2P mechanics still need some TLC. I'm confident we'll get there but you, I, and a good number of others aren't seeing many (or any, in some cases) other players. And that traffic report counts only players (did some experiments with this).
It all depends on where you go.
I was also wondering if there was something up with the matchmaking since Gamma started. Then I went to the starter systems (around LHS 3447)...players everywhere. Not only that...the experience was also a lot smoother than previously.
More and more people have also started to involve themselves in the story events mentioned on GalNet. So these systems also have quite a number of players around them at times.
I've been hanging out a lot around the nav beacon at Lugh recently and there's usually been 1 or 2 other players in there with me - plus a few in SC when I've been returning to cash in bounties and re-arm. Sure, it isn't like massive numbers of players at any given time, but relatively consistantly I'm not alone.
It all depends on where you go.