I suppose it would depend how the plant was genetically inclined to grow. The sativa grows that my friend has done all tend to grow multiple tops anyway, I think one plant grew like 12, all within about a 4" height range.
One thing I have noticed is that if when you clone, you don't plant the cutting more or less plumb vertical, or don't compact the soil around them and they tilt, all the side branching starts growing up to reach the light, and you end up with a really bushy plant, although it will almost certainly need supporting after the 3rd-4th week of flowering when the buds start weighing.