Today, the Sorenson Molecular Genealogy Foundation (SMGF) reported that they are adopting a standardized Y-STR reporting system proposed by the National Institute of Standards and Technology (NIST) of the U.S. Dept. of Commerce and supported by the International Society of Genetic Genealogy (ISOGG).
The standardized system was first published in the Fall 2008 issue (pdf) of the Journal of Genetic Genealogy (JoGG).
First, let me add a note of caution – this change ONLY represents a change in how results are REPORTED. Even though companies report results differently, this does not mean that the actual DNA testing results are wrong or different! This shift is NOT to correct errors in testing results; it is only to standardize reporting.