First, ease up on the punctuation. I don't know what Question Marks did to you in the past, but I can't see any reason why you'd have to over-use them every time.
As for server pops, there's 2 parts to that. Remember how we got into the game in waves? Yeah, me too. I know. Crazy, right? Well, it spaced people out pretty evenly, so rather than having 500 - 1000 people on Tython, Ord Mantell, Korriban, and Nal Hutta, there were maybe 200-300 in each to start with. And then they continued adding people, slowly, to keep that going.
I don't have an exact figure, but between your Fleet Station, your 4 starter worlds, your flashpoints, and then every world up to a certain point, I'd bet you could add that up and find 5,000 people concurrently. But it's more or less spaced out so that there isn't a glut at any one point. There's no concentration of people in one spot, which is the point - questing becomes a nightmare when there's multiple people running the same quest in the same spot and the mob competition gets to "waiting for respawns."
Soon enough, you'll find your 500 people in one spot, with 3,000 off questing and 1,000 in flashpoints. For now, enjoy your ability to quest with relative impunity.