There are many great songs that, by design, open with a chorus: Tomlin's "Chosen Generation" and Matt Redman's "10,000 Reasons" are two that come to mind. Also, when introducing a song, it is common to teach the audience songs by going through a couple of choruses at the top before starting the "real" song. This can unknowingly play havoc on a band.
It shouldn't be too surprising to hear the typical V C V C B C C form is engrained in worship musician's brains. We are creatures of habit. The havoc of adding a chorus at the top of the song (C V C V C B C C) comes generally when it gets time to go to verse two. Our brains subconsciously process that two choruses have already been played and instinctively a repeat of the chorus or a bridge is where we want to go, not verse two.
I've seen this phenomenon play out in myself and in my bands over and over again. Definitely something to look out for as music directors and musicians.