Hibernate version: 2.1.6

We had some major performance problems with retrieving data from a table with several many-to-one relationships; problem solved by adding lazy="true" to the 'to-one' table.

There are many complex relationships in our data model; a good number of them are on the to-one side of many-to-one relationships. Is it ok to simply add lazy="true" to every table by default? Are there any drawbacks to doing this?
Since we have 105+ tables and the data model is still changing I wonder if I can do this automatically when running middlegen...?

TIA

This is quite okay, in fact lazy=true will be always the default in Hibernate3