The survey is based in North America, and given the smartphone situation that Nokia is under (the Lumia devices and the occasional pay as you go handset) the satisfaction rating is almost all down to their Windows Phone range.
Numbers and reports like this should be rolled back into the sales changes quickly. It augments the cracking reviews that the Windows Phone 8 hardware has been receiving online and in the press, it emphasises that Windows Phone is a good operating system to use, and it continues the idea that the once people use the OS, they will appreciate everything it offers.
The survey is available via ChangeWave's website. More details on the report can be found at Cellular-News.