so when is the release date???
From past experience, Apple doesn't like to release everything at the same time. My theory is that iOS 7 will be released in September and later the new iPhone (The usual complaining will be posted about the new iPhone here on September 10th). My guess is that Mavericks will be released 2 to 3 weeks before the new iPad and the iPad will be at the end of October and Mavericks near the beginning of October. The new Mac Pro will most likely be launched in November.
If Mavericks comes out later then that meant that it still had some beta issues that had not been resolved yet.