If you spend any time in the campos, the cibaeno accent is strongest in Provincia Duarte. I always understood the Cibao reaching from Nagua to somewhere past Santiago, between the two mountain ranges. Some as far as Dajabon call themselves Cibaenos and when I was working the mountains near Puerto Plata/Sosua, some on the North side of the Northern mountain range call themselves Cibaenos. I think it is a matter of self-idendification. But San Francisco de Macoris is dead center of the Cibao no matter which way you look at it.
