Regulus
Regular Member
I think there's two very obvious issues with the Celtic-speaking peoples of the Iberian penninsula: they didn't constitute a homogenous group, and instead, they were very diverse. The Celtiberians of the upper Ebro area were culturally heavily Iberian-influenced, whereas said influence was absent further to the west. The Gallaecians were cultural influenced by earlier Lusitanian culture in the area.
That may very well be true in general.
The main difference from my side would be that the various waves were homogenous among themselves for the most part but began to mix over time. For example large groups of Urnfielders move into certain areas, held them, and then either mixed in with Iberians, drew back to the West of Iberia, or did a little of both as Iberians retook areas. The 'borders' in Iberia were in a state of flux between Iberians and Celts for a very long time. The situation does not appear to have been settled until the days when Carthage and Rome had their spheres of influence.