For all your NoLimits tool needs:
http://nldc.interfix.net/toolboxThe tracks you're looking at have been designed in what's becoming the standard way to build coasters in NoLimits. That is, that you initially build the coaster's heartline path, generally unbanked and preferably constructed using NoLimits Elementary ( www.gravimetricstudios.com/elementary ) to ensure mathematical precision, and then bring up your heartline path in Buster's AHG. The AHG automatically re-builds your track a user defined distance away from the heartline and banks it appropriately as to minimize lateral Gs. It can get more complicated than that, but I think I've complicated it enough for you already. I suppose the simpler explanation is as follows:
High vertex counts are the result of math and more directly, use of the AHG in track construction.
Bill (I edited this post didn't I... yup, I knew it)