Dan

I used to kind-of use a sharp motion when snapping any tile on a rubi to be honest and found very few problems.

I found on ceramics if you go too slow the score starts to snap at one end first and slowley breaks like you would imagine ice breaking or something which left a less neater edge.

But as you said mate, it's a case of don't do anything different if it's working for you. I suppose wheels and tile makes and types are all factors of the snapping situation. lol