Could you define low for us? I'm in my late 30s and I'm at around 12 greens now just an hour into my level. Re: the low levels that did not get many greens, are you in a beast dominated zone or a humanoid one? Also, there simply aren't as many green items for the really low levels.
Just finished level 37. I quested exclusively, no grinding. I killed a number of mobs involved in those quests, granting me a total of 18 greens. These were not particularly grind heavy quests, but involved elite quests etc, it was a relatively low kill-count for a level. Definitely seems excessive.