I truly have no bias as to east or west side, I'm in central valley (so the actually shit part) and I have friends and family on either side, it's my third year down here. Both have really nice parts, the west side is of course still developing, and the east side has the crown jewel in Scottsdale. I look at the high schools (as I've been a high school baseball coach) and the neighborhoods I've driven by and driven through. As well as high school facilities. Both have some areas that I consider kind of dumpy as well. I would think the west side's income data is generally skewed by snow birds as there are much older communities over there.
I put the low attendance blame far more on the Coyotes poor marketing, coupled with relocation concerns and poor play than I do location. Like I said in an earlier post, I think that the location proposed would make attendance marginally better, more due to population numbers than anything else.