New York: 40K HHS/NYSoH Discrepancy (sort-of) explained

Contributor Steve Ciccarelli brought the following footnote ("Appendix D") from the February HHS report to my attention, which kind-of, sort-of explains the 40,000 QHP enrollment discrepancy between HHS (which gives the 3/01 total as 244,618) and the NY State of Health Exchange, which had the total as appx. 285K as of 3/01:

It is important to note that the SBM enrollment-related data that are reported in this issue brief represent state data that have been reported to CMS through March 7, 2014, and may differ from comparable data that have previously been publicly reported on SBM websites or in media reports because that data may be based on different time periods or metric definitions from those used in this report. 

I've already corrected for the "different time periods" in order to get the 285K number from the NY exchange for March 1st. The 40,000 difference between them and HHS appears to fall into the "different metric definitions".

Which tells me...exactly nothing. Sigh.