Apple and iOS 7 beta

This letter to employees goes onto say that Apple Retail employees are forbidden from sharing the beta... However, employees say that management praises discussions of iOS 7 that note the software an update coming to the iPhone 5 this fall, not a currently-shipping version. Employees are encouraged to point customers to Apple’s official iOS 7 website.
— 9to5mac
Source: Apple.com

Source: Apple.com

As a company grows bigger, it is harder to control future product details leaking out. The first step to curb these leaks is to clean the house (Apple employees) and then worry about the third-party parts suppliers.