What kind of Matcha Green Tea Powder does Starbucks use?

I've done a little researching (okay, okay, so I only found out with Matcha even WAS today), and I was curious as to what kind Starbucks uses.





And another question; is the difference in brand really that different in taste?What kind of Matcha Green Tea Powder does Starbucks use?
Starbucks's tea arm, Tazo, produces the matcha mixture and dispatches it to Starbucks stores in 1-lb bags. The mix itself is under half matcha (probably ingredient-grade), since sugar is the primary ingredient!





Most matcha lovers can distinguish a slight difference in taste between brands, since the Japanese tradition is to produce a limited number of tea styles and for each teashop to create its own blend of leaves from different parts of Japan. However, if you have taste buds you should be able to distinguish between 100% matcha (any brand that doesn't say it's presweetened) and %26lt;50% matcha (what Starbucks uses).