Pretty much most areas of the country had some sort of Prep-Op (Pre-Opt, VaOP, Prep-Opt) whatever they wanted to call it for several years.
In 2012-2013, it was known that the following season, Xcel would be Nationalized. Region 5 adopted the National rules a year early. Region 8 and others with strong Prep-Op programs adopted Xcel programs… pretty much every region had one at least on a limited basis, but they had slightly different rules (minor things mostly - Region 8 was slightly more difficult at Gold for sure… I know because YMCA Nationals were in Georgia and we were worried that our Golds would have to change their beam dismounts - they didn't have to because they went by Region 5 rules 

 )
In the 2013-14 season, the Xcel Program was officially a National Program under the auspices of USAG.