Using wet saw for cutting tile
If you are using thin-set, then damp is fine (as in, dry with a towel).  It is usually a good idea to damp the tile and substrate with a sponge anyway, (especially if tiling to wood/gypsum(drywall) etc.) so that the substrate doesn't soak up all the moisture from the thin-set.

If using mastic, you want the tiles to be dry.