Correct me if i'm wrong, but it almost sounds like a few of you guys starting to doubt NS becoming canon at all. there is too much NS build up, It's like the bubble that one of you mentioned earlier. Sakura is keeping her feelings on hold due to the war, now lets just say for arguments sake that all this NS build up is pressure. every moment they have together adds on to that pressure, and eventualy it will burst and NS will become canon. and since its been building up for years, I think we wont have to wait for very long. It's just like what Zabuza (or was it Haku?) in act I. A shinobi can try to cover up their emotions all they want and in the end they will fail on the account of being human.
heck there are times you can clearly see emotion in the characters In the middle of a mission both good and bad.
Thats why I think that NS is just around the corner. If not in the next 1-4 chapters then soon none the less.