Information on incoming.debian.org

[Jan Christoph Uhde <linux@obiwahn.org>]

http://www.debian.org/doc/developers-reference/resources.html#incoming-system
this page says packages in incoming are verified by a script called 
Katie. And has
been approved by a FTP master. It seems to me that there is not much of
checking on packages in incoming before they go to the pool.

While
http://www.debian.org/devel/incoming_mirrors
states that the packages are totally unverified and should not be used.

What is the exact behavior of the system?

regards Jan