Timing animations with sound really does make a huge difference. The whole experience seems fuller and more well rounded, and it's usually not that hard to do.
Parks and Recreation, the TV show from the creators of the American version of The Office, has an intro that demonstrates this quite well.
The first intro times the introduction of the title text to the first jingle in the song, and then the beats to the frame transitions, which feels playful and fun:
That sense of timing would improve a lot of e.g. paid-for product demo movies.