While trying to make a map for the new snapshot using scoreboards, I found that scores will not activate in Creative mode. This is especially significant with the stat.flyOneCm, so you cannot find out how much you flied.

To reproduce:
-Enter Creative (with cheats)
-Type "/scoreboard objectives add fly stat.flyOneCm Fly Distance"
-Type "/scoreboard objectives setdisplay sidebar fly"
-Fly around a bit