Remember, iPad releases typically happen in October, but Apple has not always followed this tradition and even broke from it for a few years. This information is simply a rumor and may not hold up against the test of time. It is not unlikely that Apple may decided to unveiled the new iPad with the iPhones or even the start of next year during their March event.
Also, rumors suggest that a 16-inch MacBook Pro will be released this Fall with some speculation that the device may be unveiled at the September event. We will have to wait and see to be sure.