Just thought I'd throw in my 2 cents as a person who works downtown in the Arena District. I tend to get stuck on 1x the entire time I'm at work. The following is what I'm seeing speed-wise from Speed Test:
763ms ping, 58 kbps down, and 24 kbps up. I would say this is about average (i.e. less than .1 Mbps up and down), but it's higher than what I usually get, probably because it's now mid to late December, and less and less people are at work through the end of the year.
I'd post results for WiMax (I'm on the original EVO 4G), but I don't pick any up at my desk, which is probably more of a reception issue than anything else, because i can pick up WiMax a block or 2 south of here.
With all that Sprint is doing to deploy their LTE network and NV, it's too late to save me as a customer. My contract runs out in a few weeks, and I'm probably heading for Verizon, but I'll watch this thread to see if there's any news encouraging enough to keep me for any longer past my contract fulfillment date.