Spirituality focuses on authenticity and honesty. Religion tends to emphasize perfection and holiness. In fact, so great is the pressure to be progressing that people often lie to each other and even themselves about their religious experience and where they really are in their lives.
Burke and Taylor, A Heretic's Guide to Eternity, p 60
This is one criticism they have that has a bit of validity. What I question is how much "authenticity and honesty" is in their spirituality.
For one thing, we have to question what is meant by "authenticity and honesty". Perhaps it involves many things, but one sure thing it seems to involve is that one can admit to practicing what was once considered bad and sinful behavior (homosexuality, worshiping other gods, wanting other people's property through 'social justice', breaking the laws for rather lame reasons) is not only something they can now admit to, but also things that these people will support them in doing.
Now, on the other hand, if you disagree with these people who practice "authenticity and honesty", well, you may find that your own "authenticity and honesty" is somewhat less welcomed.
Perhaps there is pressure in churches to appear more spiritual than one really is, I'll not deny that. But I don't think that the church is alone in that fault, but that emergents are as prone to it as any other. The truth is, the 'emergent conversation' is not so welcoming of dissenting voices as they would like to pretend. One need only ask Mark Driscoll how welcoming they were of him when he started questioning them.