Then maybe they shouldn't have announced it or announced it with a reasonable target date. Yes people might moan if they delayed it, why shouldn't they? Some people may have bought their phones with the expectation that in terms of IM or other apps the require notifications, that Apple would meet their announced goals of having this feature. It was announced as the perfect solution to Apple having denied apps the ability to run in the background. I think it really is a elegant solution, but they need to meet their obligations. Having apps received notifications, such as IMs, is a basic feature for todays smart phone. Since Apple, rightfully, prevents the apps from running to receive them themselves, they need to get their support of push updates out soon. At the least they should not have announced it would be out in Sept if that date was questionable. But they did and a tiny part of me believes it was because they didn't want crippled IM apps to a deal breaker for those people that rely or use apps like IMs or Facebook. Those that might have decided to wait or go with another device were led to believe that the solution was right around the corner.
Apple needs to refocus their resources to meet their promised obligations. Instead of wasting development time on Emoji and StreetView and a new Safari layout, none of which were promised or really that compelling (not enough to be a deal breaker if missing anyway), they should have had those developers working on what they had already promised and is already 2 months late.