I've noticed that this year (on the boundary of Zones 7/8), I've had more daylilies blooming out of sync with one another than ever. We're getting excellent performance this year, in part because we've had 2 very good years of moisture after about a decade of drought, but this out-of-sync issue does seem to be a downside of this year.
Granted, most of my 150 or so are blooming in line with one another - and there's always an issue with the cycle beginning earlier or later depending on weather. For instance, I know when peak daylily season will be in a given year based on when my earliest non-Stella bloomer, "Cosmic Hummingbird", first blooms (usually around May 12; this year, it was May 4).
But yeah, I have early season daylilies like "Frank Gladney" just starting to bloom, and some of my first non-Stellas to bloom this year are categorized as midseason bloomers. It's still a small percentage of my overall selection, but bigger than usual.