Actually, what seems to be happening is that people made orders and Sprint gave very distant shipping estimates (9/30, 10/7) and people are getting upset that on 9/22 their phone isn't delivered yet.
Honestly, It's been 6 days since launch so we still have weeks before we can even say that anything is "late".
No, that's not it.
People ordered, were given distant dates (tomorrow originally for me) and have seen devices with even later dates shipped already.
People have orders and have been trying to understand why they receive different answers from different sources.
People ordered and want to know why other carriers have the same configuration shipping while Sprint has none.
People ordered and want to understand why an order placed right at opening on 9/9 is in the same window as one placed on 9/16.
People want information.