In the hibernate documentation:

http://www.hibernate.org/hib_docs/v3/reference/en/html_single/

there is this advise about using DAO:

<quote>
Consider abstracting your business logic from Hibernate.

    Hide (Hibernate) data-access code behind an interface. Combine the
DAO and Thread Local Session patterns. You can even have some classes
persisted by handcoded JDBC, associated to Hibernate via a UserType.
(This advice is intended for "sufficiently large" applications; it is
not appropriate for an application with five tables!)

</quote>

So when should i consider using DAO? What is considered a "sufficiently
large" application?
According to the quote above, five tables is not. But what is?
Is a 20 table app a sufficiently large one? 50? 200?

Any help is a appreciated.