Months to walk between citys?! I can wall between al the towns in my area in around 3 hours they are spread around 15 miles apart, also it's a game, the only way to have such scale would be to have the world broken up which I personly hate, ala fable n dragon age,
Not saying I'd want it at that scale. Daggerfall was the only thing to really approach the true scale of the world, but it also killed random exploration by having so much empty space inbetween everything, necessitating fast travel (even with DaggerXL and it's much larger view distance, it can take a good 10 to 20 minutes of nothing before spotting civilization; sometimes longer).
That said, I would like somewhat longer distances than what was in Oblivion. If for no other reason than to be able to turn down the timescale.. seriously, that's really the only reason I don't lower Oblivion's timescale, because it makes the world feel so small with as fast as I can travel around in game time.