Yes, all curve types are supported: Nurbs/BSplines, circles, arcs, lines, polylines, spines, elliptical arcs, ellipses, shapes, complex shapes etc. Meshes are not supported (because Revit doesn't support them) but you can explode them in Autocad to one of the aforementioned types before linking/importing to Revit. Also, text is not supported as no methods are exposed in the Revit API to find it!
I've made some big improvements to this node for v2.0 of bimorphNodes, including the ability to map LineStyles to the selected levels input (when converting to Revit Model lines), and a new variant called
DetailLinesFromCADLayers which doesn't really need much explaining... its due out soon, just in the process of finalising the release!