No it's the complete opposite. The long whiskers that you see is the new growth. The Stone Pine starts it's growth with the short needles (Juvenile needles) then later on as the tree matures it gets the long needles that other pines have. Later the tree will not have any of the juvenile growth on it. All the needles on the tree will be long and it will look more natural because all the growth will be the same and you will not notice the difference in needles.

Stone pine are a related to the pines in the Northern hemisphere. They were planted in Cape Town by the earlier settlers in the coastal region by the Dutch. These species has adapted to our climate. They are not used as bonsai often because they have this drastic change in needles, and their needles stay long.

I'm experimenting with these trees though as I feel the Japanese White Pines and Black pines that are available at nurseries are over priced in our Country.