Hi Ryan, yeah with NURBS models there is more overhead for each individual surface (because of how trimming boundaries work), it's generally intended that smooth surfaces should be made of one large surface sheet instead of being approximated by a lot little facets. NURBS data is a fairly different way to represent objects than polygon mesh data, it tends to work pretty well for converting from NURBS into polygons by dicing up large surfaces into little pieces but it's pretty difficult to automatically "undice" things in the reverse way.

- Michael