PCG Point Clouds exported from Recap will not import into Revit 2013

The scenario: you receive raw point cloud data, and want to process it in Recap (part of 2014 suite), export to PCG, and import back into Revit 2013.

Or: you request a PCG from a surveyor for Revit 2013, and they give you a "newer" PCG from Recap that will not import.

The error received in Revit 2013 is:
"Unable to create a Point Cloud instance.  The file may be an incompatible format or corrupt."

However, if you index the same raw point cloud data using Revit 2013 built-in indexing, the resulting PCG will work fine.

It would seem that there is some difference between the built-in Revit 2013 indexing of PCG point clouds, and the PCG point cloud exporter in Recap.

Workaround:

1. Process the raw data in Recap (requires indexing time)
2. Export to PTS file
3. Import the PTS into Revit 2013 (requires indexing time -- again)