Nicko,
French Polynesia is a term to describe the territory that France still govern in the pacific area. It includes 150 islands in the south east Pacific. Among those are the Marquise Islands, Société Islands including Tahiti.
I checked the Larousse Gastronomique on vanilla. Roughly translated they say:
"...distinguish four types of vanilla the vanille fine (fine vanilla) with a long bean (20 to 30 cm) black in colour and extremely perfume. The vanille ligneuse (woody vanilla) (13 to 20 cm) is dry and a little frosty. It has a brown red colour. The vanillon (10 to 12 cm) is thicker, flat, soft always a little open. It has a brown colour. Its smell is strong and a bit acidic. Finally there is a variety that has a yellowish tint, imported from India that has almost no aroma.
Regarding the origin, the vanilla from Mexico, ley or leg, is the most valued one, followed by the vanilla from the Indian ocean, Madagascar, sold under the name Vanille Bourbon. Then the vanilla from the French Polynesia.
I guess the rating of the different vanilla varies according to source. I always thought Mexican vanilla was of poor quality. It seems that different sources have different ideas about which vanilla is best. I found a website that sells vanilla and they rate Tahitian vanilla as the best one (
http://www.icdc.com/~vanilla/ ) I did a search on vanilla and most often Tahitian vanilla is rate as the best vanilla.
Sisi