[klodolph]

That's a good analysis of things, and on top of that, when you're new you'll treat an ORM like a hammer in search of a nail. So someone who's less experienced and doesn't realize that you should supplement the ORM with raw SQL queries might try to evaluate complicated queries in the ORM, with the usual results. Some of that has changed with e.g. LINQ and IQueryable in .NET, but it's no panacea.