I can verify that this is true. I sailed solo, single occupancy, for two weeks on the Allure and got single credit for the first week and double for the second week. I wish they had started it sooner as I had sailed for eight of the last ten weeks, but better late than never.
Freedom OTS B/B March 23 - April 6, 2014
Independence OTS April 26, 2014
Independence OTS -Transatlantic - May 4, 2014
Vision OTS June 9, 2014
Explorer OTS B/B November 29 - December 12, 2014
Quantum OTS - April 24, 2015