Absolutely! I was so interested by the work of Sykes & Oppenheimer that I had my own mtdna tested. I knew my gradmother was from Ireland and indeed turned out to be from 'clan Tara' which originated in Tuscany and spread all over Europe in the mesolithic, but with particularly high instances along the Western Seabord ( inc france/Spain/Portugal),and also in Cornwall and Ireland.
However, my dna is relatively rare compared to type H which is the 'Basque' area gene. This is the most common in Europe as this is the region many people sheleted in the Ice Age but of course there has been difference mutations in various clans as they spread across Europe. The Brits,Irish & Basques still have a very close match,however.
Something is not right. This message is just to keep things from messing up down the road