I have only tested with Ancestry so far:
Original Estimate was: Great Britain-52%, Europe West-19%, Ireland, Scotland, Wales-15%, Iberian Peninsula-8%, Finland, NW Russia-3%, Scandanavia-2%, Caucasas-1%. This was a poor representation of my ancestry as I am 100% UK and Ireland back 6 generations.
The new estimate is much closer: The admixture from Norway is likely the Viking heritage in the Scottish and Northumberland ancestors and the NorthWest Europe is reasonable because there are Norman French surnames from England. The estimate also suggested that my family was part of both the migration from Scotland to North America and New York settlers.
England, Wales and Northwestern Europe - 57%, Ireland and Scotland - 38%, Germanic Europe - 3%, Norway - 2%.
The addition of over 13,000 DNA profiles certainly helped Ancestry to be more accurate in my case.