He is talking about integrated JSF tools of Sun Java Studio Creator.
The init() method is definied in the [url=http://developers.sun.com/docs/jscreator/apis/jsfcl/com/sun/jsfcl/app/AbstractPageBean.html]AbstractPageBean[/url].
I don't know the answer tho. I don't use Studio Creator. Eclipse + JSF RI 1.2 all the way.
It's not clear, what do you think a page is. A page is more than just one bean. There are JSPs, Servlets, renderer, some XML, HTML or other output. A page bean or backing bean is usually in request scope not in session scope. Add some logging statements to your session bean in constructor, init() method and action method to watch the order of execution. There may be differences between managed beans and not managed beans.