I did it three times, got some different questions each time, and got completely different results, other than all of my results are west of the mississippi. But I did get California results twice, and one test I took I got 3 cities in Arizona. I got Salt Lake City once, but apparently if you say "potato bug" then it automatically pegs you for SLC.
But it kind of makes sense. I lived in Phoenix for a year or so right out of high school, which could be pretty formative for language at that age. We lived in Portland and Vancouver for a while, and my wife is from Pasco Washington, and one of the Cities I got was Seattle. We have spent a lot of time in California, and I got Stockton and LA on different tests. So I guess you pick up different things at different times.
For all those from Utah did you pronounce "been" as "bin" or "ben"?
I would bet on "bin".