Yeah, there's 2 clicks. One to focus (if you want) and then the shutter button.
I was just curious, I like having the separate shutter button, with or without 2 stage shutter focusing, or whatever (I had to check my phone to see if it had it, since I'm usually just clicking off quick pics and not composing shots). The button just seems more natural to me. The ability to use the + volume button would be a welcome addition to me I'd think.