I've read the posts and they are very interesting. I use both methods and feel everyone should be able to. Mostly I use it as a slide stop, but for a different reason...maybe. Beside the fact that I can't reach most of them easily, without an extended one, is old age and arthritis makes it difficult to work most of them. Not being a high speed low drag kinda guy, I use whatever works. I still shoot bowling pin and use the slingshot method as I can use my whole hand and don't have to change my grip, which I feel important. It might be a tad slower on the reload, but I'm faster on back target.
I do use it as a slide release at times and I'm glad that the choice is there. As people age you adapt and change to stay in the game.