I would consider 10% of the population, plus a large percentage of the economic base, to be rather considerable. Moreover, Anatolian Turkey is hardly the dark side of the moon. Culturally, it is quite modern and Westernized and European. Have you been to Anatolia?
Yes, I've been to Anatolia, and it is not European. Modern ad Westernized does not equal European. If it did, then maybe Japan and New Zealand should begin accession talks??
Actually, come to think of it, New Zealand might have a better claim to 'Europeaness' than does Turkey..