It's not ALL qte's, but that is probably the majority of the experience. Even all the gameplay trailers show this. You walk around for a minute, find an item, it triggers an interactive QTE where the only control you have is hitting a button every now or then to determine how the QTE progresses. Then after a few minutes of that, you get to walk around again and reach another QTE trigger point.
I've never played Indigo Prophecy, but have seen many gameplay videos of that as well and it looks like mostly QTE's too. I'm not saying the game will be bad. In fact I'm sure it will have a very rich and developed story because of how they create the gameplay and QTE's.
But for anyone to say there is a balance between user gameplay (user moves the character and has full control) and QTE gameplay (watching the events and only user control is on button presses) they are either being misleading, have a weird definition of gameplay, or haven't played these games. Even MGS4 was unbalanced in this regard because the cutscenes lasted longer than the actual gameplay time.
I hope this clears things up. It will still be an amazing game with beautiful graphics and moving story. If I have a PS3 again by then, I'll pick it up. CGI be proud 
