I'm sure those builds are impressive, even if they dont really look like a part of the sl I know... but what level of skill is required, how long, for example, does it take to create the tyrannosaurus skeleton - is it one prim or many ? is it a normal sized prim or a megaprim ? or does this push the old idea of prims out of the window ?
What about the people who use and understand the building system, we already have in world ?