And I would be right. Interestingly, by January 2015, no year was continually lowest in March for more than 5 days (2011), and no year continually lowest in February and/or March for more than 10 days (2006).
Seems it's pretty hard to be lowest for a very long time during this season, making this 22–day reign very significant.
EDIT: 2006 actually had a March lead that lasted more than 5 days, but it went into April, so fooled me at first. 2006's lead in March was for 18 days, and the total length of this lead when April is included was 31 days.