For years I've noticed approximately the same number of male/female flight attendants. Nothing special about it in the last few months. Although always notice men more commonly do the "back office" work (and walk around with bread baskets), whilst the SQ girls do most of the work interfacing with passengers.

Had perhaps assumed the approx. 50:50 ratios it was something to do with Taipei accident, but that is just me drawing conclusions without anything to support it.