I took my newly created druid up to Sunstrider Isle, just because I was a bit tired of Mulgore, and definately the Barrens. When I finally got there (it was quite a long run, I was surprised), I was level 2 and didn't find any quests. It took me around 30 seconds to alt tab out and google for the answer, which said that the level 1-5 quests are only doable for BE's. I didn't know that. I had to grind up to level 4 to be able to take some quests in the next area. Has Blizzard stated something about this? I know there is a quest which requires the Mana Tap ability and I already expected that this one wouldn't display for me. But the rest of the quests are perfectly doable for other races, so I don't see any reason other than a bug why they wouldn't display. It's like that for both Draenei and Blood Elves. It was likely done originally to keep both areas from being too crowded when the game came out and since then Blizzard probably has forgot.