1st Capsule is now open
According to BBC, they've now opened the first capsule and it looks like its got a good quantity of rocks and dust (judging by the pic on the BBC website it certainly looks more then a few grams although without a scale it's hard to say for certain).
https://www.bbc.com/news/science-environment-55315502
Great work Hayabusa Team! Have one of these --->