I'm really excited in the US-Russia match. Can the athleticism of USA beat the experience to the Russian team?
I think Destinee said that as a sign of frustration. The team is young and inexperienced... she's feeling the pressure of winning. I don't see anything wrong about it though but for the rest of her teammates it might be a little negative.
I hope Japan can beat Brazil hahaha.
I still don't quite understand why Destinee was so sensitive at Logan shown a LITTLE more emotion once Berg subbed. 
Logan played poorly and she knew it and I don't think she blamed on Glass. But once Berg subbed, it more like she hope may be Berg can bring sth different helping she out of the poor hits. In fact, Logan's face&body language almost totally the same, only few more chats with Berg, but what's wrong with that!??
Poor Logan, had a bad match and also got blamed on-air by your teammate for showing more emotion 
Hope it won't effect in the Russia match.