I think the short answer is yes. I would not recommend EJB3 persistence to be 
used for report generatation, which typically requires large datasets to be 
loaded and processed. Vanilla SQL can perform a much better job at that and 
provides more flexiblity.

Were EJB3 is great is providing a elegant Object-Relational mapping for 
business services. Tasks like fetching a single contact with attached addresses 
are ideally suited for it.

Hope this helps
Alex
ejb3workshop.com

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