Actually Vaz, thanks to Forgeworld, that was probably a Battleforged list. The new Y'Riptide is a FA slot, while the R'Riptide is Heavy and the standard is Elite. With enough points, a single CAD can now run 9 Riptides... 10 in Farsight with his special IC bodyguard.
If I remember correctly (I play tau but didn't really like the Y'Riptide), it's very short range compared to the rest of their army. Lascannons, as mentioned, and more long range firepower to take them out early. A Torrent and the 'ion shotgun' don't have more than 24" range. It does have some crazy manueverability, because it has a 'swoop' style move with an impact landing. Like anything Tau, it folds in melee, and I always felt like it was too eager to get close to the enemy.