I developed projects with NHibernate in couple of years before and at that time I searched and read many articles on advantages or disadvantages of ORM or ADO.NET / Stored Procedures. There were so many technical discussions and comparisions between those technologies.

Later on when I started to study on LINQ I thought the performance and any comparisions between those three. But I hadn't got enough time to test. I have just found a guy, Maximilian Beller, has written two nice articles compare the performances and properties of those technologies.

Recommendation: NHibernate, Linq or ADO.NET?