Russell D. Moore over at First Things doesn't think so. I don't know myself, but his first three paragraphs are exactly how he should go about it. People who interview him just assume that there must be a shift. Because Millennials. Because others have. Because you're-on-the-wrong-side-of-history.
He asks what the evidence is. There's a thought.
I can't help him out, even off-the-cuff. I knew lots of young evangelicals, but they aren't young anymore, and most of them aren't evangelicals. They are nonbelievers, mainstreamers, nonattenders, and evangelicals in vaguely similar proportion. I suspect the current young evangelicals at my own church (which is in a bridge denomination to begin with) are not entirely representative. It's a wealthy suburban church in New England.