Board Thread:Off Topic/@comment-25857155-20150111054847/@comment-25555436-20150209005620

Yes, a slower projectile would be generally harder to land. More reaction-time for the oponent. Of course, size can change that a bit. But since you didn't specify the size, I assumed it was around medium-sized, which combined with it's high-velocity, would not be a particularly hard-to-land skillshot.

Dificulty, it all depends on the skillshot. Some are relatively hard to get done right, like Ezreal's Q or Nami's Q. Others are stupidly easy, like Ezreal's W and Ahri's Q (really, it's not that hard to land, unless you want to do that combo with the Ulti for the ball to seriously curve).