In reply to Tyler: Agree, info about indoor walls would have been useful, but I would like to counter the age old myth of climbing being excessively limited by bad weather. Since I've lived in N Wales I have managed to climb outside much more than I ever did when I lived in Yorkshire. Llanberis might have a high rainfall, but out on the coast the reverse is true (Colwyn Bay for example has lower rainfall than Sheffield, and certainly lower than Hathersage).
I even made it through one winter without climbing indoors at all, and that was getting out 2 or 3 times a week. There is no way I could have done that in Yorkshire.
Another ommission from the article is a mention of Caernarfon - it really has improved vastly in the last 5 years. Bangor seems like a ghost town by comparison these days. Go and check out the Anglesey Arms down by the Castle front - good beer, friendly atmosphere and a fantastic location.
And then there is the language/schools issue. Most incoming climbers I know haven't made much effort to learn Welsh, but the ones that do will see a very different perspective on life in Wales. It's not an easy language to grasp, but I found it very rewarding in the end. I'm not fluent at all, but I can understand most stuff I hear and read. My kids (aged 6 and 8) are fully bilingual and I'm sure they will find it easier to learn other languages as they grow older.
In the end, N Wales' greatest asset from a climbing point of view is the volume and diversity of climbing combined with a large, friendly/inclusive climbing scene - nowhere else in the UK comes near, not even the Lakes. I can't imagine living anywhere else now.