Ok!Here's a question.
Let's suppose that Sakura didn't make the fake confession(actually it was real),do you think that NH or SS would have more chances to become canon?
That confession wasn't real or I should say it wasn't 100% real. It was done to create tension/confusion between the two and show a elements of a more reality like situation in love triangles. I believe Naruto got the initial hint that Sakura might like him in the Pein arc hug and it was more or less confirmed after this confession. I don't think any girl would go as far as lie to her best friend that she loves him when she doesn't actually have such feelings.Its difficult enough to lie and say 'I love you' to a person who is not close to you. Doing so to your best friend is almost impossible. But still, I don't think Sakura was 100% sure about her feelings when she confessed. That's why we are bound to get a heartfelt confession soon.
I actually do believe NH/SS would be stronger if there hadn't been for Sakura's confession because that confession confirmed that Sakura is indeed conflicted in her feelings.