Fidel Castro wrote an online column saying that, “Raul did very well keeping a dignified silence.”
Both Russia and Cuba have everything to gain from ambiguity, and so I think that they will continue to be ambiguous.
That’s part of Teddy Roosevelt’s idea behind the hole “talk softly” foreign relations.
I would note that the rumor is not about a permanent base, just a refueling base, but that would still give NORAD fits.