Hve no fears about hanging the speakers on the wall. Unless the termites have been feasting on your studs, the walls are made of paper or there are no studs to be found, the T bracket provides plenty of weight dispersion on the wall. Couple that with a couple of dry wall anchors and you're set. Dry wall is surprisingly strong if you spread the weight out enough...
But - to double check - are there any horror stories out there of people whose speakers have fallen from the wall? I have only heard stories about people QS's "jumping" on the brackets - but I suspect foul play.
