What classifies a "Ski Boat"? Any body know?
From what I have come to see over the years, an actual ski boat will have an inboard motor which is positioned in the center of the boat to keep the weight farther forward, minimize bow rise when the boat get's going. This is important because when you pull a skier, you want the boat to be able to have a steady hard thrust to basically pull the skier out of the water quickly rather than to drag them while the boat is trying to get on top of the water. A ski boat also has a very shallow dead rise and for the most part is pretty much already on top of the water when it launches.
While running, a ski boat will have a very shallow wake which leaves very little to launch the skier as they ski from side to side.
Many people learn to ski behind regular boats which simply have a ski hook. Many to not get up to speed very quickly and make it even harder for a first timer to get on the skis. When the hit the gas the aft end of the boat dives into the water, the bow rises, and it tends to drag them through the water with underpowered boats. However if the boat has good to decent power it may not matter. But with the engine being at the rear of the boat, it could still have a sizeable wake. Great for tubing but not so much for skiing.