I'm really surprised there is nobody to be found in PvE lands for you. Now, if you would have said this a month ago, I would not have been surprised. But they recently changed it (temporarily, it may end soon) so that xp is doubled in the classic lands. Everyone I know has created an alt or is out leveling artifacts or doing something occasionally because of this. Anyone leveling before usually did it in TD's, but now, classic land xp groups are very popular.
This game however is not a PvE game, and without the xp double bonus, classic lands and SI lands will be barren soon again. ToA lands and the new area, lair of hte minotaur, will be popular because of the items they drop.
TD's will be the way people use to level quickly b/c unfortunately for new people, that is what the main population base wants....i.e. when they want to level a new toon,t hey want to do it as fast as possible.
With each expansion, the game gets bigger and bigger and items become better and better..this leaves items in the old worlds not useful, so nobody goes there.
As Katie said, classic servers give new players the best chance. Bossiney is by far most popular cluster (nearly twice as big as any other), has people that level in the old lands (because ToA does not exist), has the most casual players (players that did not like having to have leet gear to compete from ToA), and has the most new players.