see, how much oregano can you put on a plate of spaghetti?
does oregano actually weigh the same amount as marijuana? no, really - does it? because i know how much a gram of pot is. i don't know how much 100 grams of pot is...
could you put a half a gram of pot on your spaghetti? probably more like a quarter, right?
so, if the orac count of 100 g is 200,000, that's about 2000/g - which is an orac count of 500 in a meaningful serving.
on the other hand, a glass of blueberry juice is going to be about 400 g - which scales up to 1200 as an orac number.
so, that number seems impressive, but the actual reality is that you'd need to get used to using a lot of oregano to even compete with a glass of blueberry juice.
as an aside, one wonders what kind of orac count marijuana might have - so long as you're eating it, not smoking it.