Not just any old rumours, but ones from people who have a proven track record, on most occasions, along with analysts. Its funny that after any rumour about what apple are doing, Samsung conveniently then produce a device or feature that is taking that same idea. All they are doing now is rushing these out so they appear to be the ones doing it first. Also, I wouldn't be surprised if they didn't have corporate spies that confirm all this, thus their commitment in releasing these based on the rumours, especially since they've already gone as low as faking comments on forums and reviews.
I've got nothing against android, competition is good, but only when competitors are doing their own thing, like HTC, Nokia, etc, rather than mimicking apple, like Samsung.