If you can't walk 2000 feet in 4.5 minutes you're probably near death (also you've got to add time to go up and down escalators)
Well, I guess I'm near death then. My jogging pace is around 11 minutes/mile which means it takes me about 4 minutes 10 seconds to go 2000 feet. Now I realize an 11 minute mile is not particularly fast, but I'm quite confident it's faster than most average people can walk.