Running this script can generate Missing Column Statistics events. If those events are associated with statements that subsequently run longer, SQL Server is expressing a need for a user to create statistics (i.e. exactly the opposite of what this script is attempting to do).

For more information about the event, see http://social.msdn.microsoft.com/Search/en-US/sqlserver?query=missing%20column%20statistics&refinement=49&beta=0&ac=5 and http://www.sqlservercentral.com/search/?q=missing+column+statistics