Rhino/Grasshopper MEP Piping

The question arose on the Rhino forum today about exporting pipe objects into Rhino.  Refer here

I'm interested to see how Revit MEP handles IFC files (other than faceted brep/mesh) shape representations, as it can make the file much more compact and efficient.  Fitting such as elbows/bends can cause large problems if these "coordination" shape representations are used.

Here's my example model that you can download as Grasshopper model or IFC file to test yourself.  I look forward to hearing the results.