@Constance: Yea, those trees are far from anything that can be called representative of what you can produce within Speedtree. But it was purely for the purpose of testing it. The PE is stupendously high, yea, but that's only because of the latter.
@Ishtara: Infortunately, I agree with Constance on the grounds of the license agreement with IDV. They're pretty damn strict over what the content can be used within and the circumstances therein.
However, it seems to be very muddy, as what is to stop myself or anyone else, from producing any sort of tree, fauna, vegetation, etc., exporting it into Max/Maya/ZB and building ontop of the base mesh. Hypothetically ofcourse, as I, obviously, do not want anybody hounding me through legal channels. Speedtree trees do stand out, as they are visually and accurately much better than what most modellers can produce themselves.
It could be used as a reference point though. Create what ever content you desire within ST, then reproduce it within your package of preference, akin to what some do by following and learning from the topology of someone elses mesh flow.