Engerek01: One of my health expert professors had once told me that an average man at his 30s needs eat 2 kgs of oranges daily in order to receive the necessary vitamin C for his body. Nobody in his/her right mind does that so it is indeed overrated.
Not 2kgs, 2 oranges (if you're counting the small kind.
Average adult male needs about 90mg of vitamin C a day.
A small orange (2-3" diameter) has 50mg of vitamin C.
Personally, I'd rather have 3 lemons. I don't much like oranges, except as marmalade (now THAT'S a good reason why oranges are better than apples).