Let's see: 2.36 kg of sugar makes enough syrup for 24L of OpenCola, according to the wiki article. So, 12oz of OpenCola contains 34.9 grams of sugar [1]. 4 grams less than the equivalent amount of Coke [2].

Not to say that this isn't still a lot of sugar, just that it's comparable to the product it's trying to emulate.

[1] http://www.wolframalpha.com/input/?i=solve+for+x:+2.36+kg+%2... [2] http://www.coca-colaproductfacts.com/en/coca-cola-products/c...