no think about it. if pre orders start august 25 for exampleGets that if preorders go a month, you are still waiting a month vs preorders for a week, and it take three weeks to get you your phone, you've still waited a month. The only difference is everyone's sense of entitlement is still in tact in your scenario.
by sepetember 16 hopefully they would be able to have everyone who pre ordered their phone by launch date
so basically we are not loosing any time we are just giving apple more time to estimate how many we need