Do you have a link to the study ? I need the number of people tested to include it to the existing data and calculate the new average.
For Portugal the main studies I have included so far are The Genetic Legacy of Religious Diversity and Intolerance: Paternal Lineages of Christians, Jews, and Muslims in the Iberian Peninsula, by Adams et al. (n=137) and Reduced genetic structure of the Iberian peninsula revealed by Y-chromosome analysis: implications for population demography, by Flores et al (n=109).
EDIT : is this the study ? Micro-Phylogeographic and Demographic History of Portuguese Male Lineages, Beleza et al.. If so it is indeed big (n=657)
I will try to update the Portugal Y-DNA data today.
N.B. : 6.1% is for I1 + I2b, not just I1 !