IIRC the DNA evidence referred to much earlier migrations via/from Northern Spain. There is no evidence, as far as I know, of any specific impact of the few survivors of the Armada. Some of the tales relocate from place to place along the West coast - bit like the tail of the Hartlepool monkey!

Regards
p.s. On a musical note, anybody recognise the Spanish connection to the "Falaingín Muimhneach" (Munster Cloak) tune?