I was in anchorage last year for work. My experience in the city was internet was similar to at home. I suppose it depends upon the provider in the small town.
I would suggest contacting the cable/phone company in that area and asking for tech specs.
I don't have an answer for your question, but I hope someone does. That is one place I have considered retirement. My only apprehension is regarding internet speed. From what I have read, it get's really bad very quickly as you get further away from the city.