Literally few?
Technically, you are right. If you're referring to the current volumes of $10 bills in circulation as opposed to other bills, that is.
Of course, based on what I read, there is still many, many months to go before the new $10 bill is being released. There may still be a chance that one final print year of $10 bills (2011 or 2012) with the new M/C signature combo may see the light of day like the M/C Journey $50's in its final months (where one full run prefix of AHP and two partial-run prefixes of AHN and AHR were issued). $10 bills, like the $50 and $100 bills, are not spent as abundantly as $5's and $20's, and in recent years there was a span of 3 years between print years (2006 to 2009 for the $100, and 2008 to 2011 for the $50). There still may be a chance that FEW may appear on the last of the Journey $10's, we'll just have to wait and find out.
This may mean the new Polymer $10's may start somewhere in the FT* range. We'll have to wait and see.