Russell Moore says no. I know a lot of millennials and I agree with him. The following really resonated with me:
Most of the Millennial-age gospel Christians I know are far more theologically rooted than their parents’ generation. Most of them are far more committed to reaching outside of Christian subcultures to share the gospel with people not like them. Would some of them rather discuss theology than evangelize? Yes, just as many in the last generation would rather discuss evangelism than evangelize.
On the whole, though, I find the Millennial generation’s grasp of gospel Christianity far better than what we’ve seen in a long time. They tend to be better at articulating a Christian vision of life, because they’ve had to do so all their lives, never able to count on a pseudo-Christian culture to do pre-evangelism for them.
Emphasis mine. Read the whole thing.