I do not believe that the 2 year waiting period to become a Preceptor should be dropped to 1 year.  The experience you get in your first year is really just getting used to or getting to know the role.  Adding on being a Preceptor at this point, I believe, could be detrimental to the success of the Administrator.  This is not an easy job and needs focused attention, especially during that first year.  In addition, how much does a new Administrator really know or experience in one year to be able to offer a comprehensive view of the role.  Now, I know there are exceptions, but in general I would say this is not a good idea.