SQL Server 2008 Hierarchy Data Type Performance?

Question

How does SQL Server 2008\'s Hierarchy data type perform compared to using the hierarchy implementation described by Joe Celko here: http://www.intelligententerprise.com/0010

Answer 1

So far, I've only found a single reasonably interesting article on the topic. HierarchyId is much faster than any self-made self-referencing table solution:

http://www.sqlservercentral.com/articles/SQL+Server+2008/62204/

I vaguely remember seeing another comparison elsewhere (but can't find it anymore) which came to similar conclusions; using HierarchyId to build up the hierarchy is a bit cumbersome at best, but query performance is stellar.

Marc