I would believe Sprint they did say that it would be delivered to you either by the 14th or 15th barring extreme circumstances AND that the tracking number might not update. I included a part of the confirmation email from sprint below. Chill out, grab a drink, and wait. Everyone should just stop acting like a spoiled brat.
"If you pre-ordered an iPhone, you are one step closer to getting your phone. We know you are dying to get your hands on it. Excluding extreme circumstances, we'll do our best to get it to you Friday, Oct. 14 or Saturday, Oct. 15. Your tracking number included below may not be updated until Friday, Oct. 14. "