got to look at several things, first, it isnt out yet, we have no pricing or release date. next is, the s6 sold well from what i understand, and most people cannot afford to buy multiple phones at all, much less multiple brand new hot off the shelf phones, just any of them 2 would run close to $1400, that is a very hard thing for the majority to do. some will, the vast most wont. so all of those that have the s6 will be bashing the g4 cause they are stuck with the early adoption. and the flip side of that, the satisfied customers, i doubt even 1/3 of s6 owners are going to be unhappy with the phone they have.
add to that all of the people who also have gotten m9's or other phones of recent release, it isnt surprising that the g4 isnt getting as much buzz, the number of people who are interested would be less then after the long drought that the s6 quenched