Florida I've had the same problem here in Orlando. I get shitting east cost speeds but great west coast speeds.
And a re-copy of my demo review:
Well the same texture issues that are in the 360 demo are also in the PC version. Best way to see this is in the hallway where the tail end of the plane crashes into it. Look at the water coming from the glass walls on both sides. 1 side has the textures the other side looks kinda like a natural gas leak.
Visually some of the shaders have been nicely beefed up, but there are spots where you notice very low textures, like on the landing leading down to the pod. Again some of the new shaders are nice especially on the floor after you go up the lift, and on the airplane wreckage when ya first crash.
Also couldn't get 5.1 working correctly as anything behind me I couldn't hear, but I could hear other things crystal clear as if they were right on top of me but were all the way across a room.
And ran extremly nice on my new system without using the new beta drivers.