Absolutely bogus: App Store developers can not only be turned down by Apple for shameful reasons like competing with a built-in App, or creating a program of limited appeal, but now you're not even allowed to talk about it. Rejection letters and stated reasons for rejections are now under NDA.
Wise up, Apple. This is a particularly onerous attempt at hushing up criticism... and it particularly gets the goat when you could simply defuse that criticism by being more open and honest about the App Store's positively arcane approval process. If this is the way you're going to treat your programmers, there's now a competing platform — Google's Android — that will likely be just as good or better than the App Store. Developers are going to leave the platform in droves. Hell, that exodus has already begun.