With no speed and athletics in the game, I'm not sure how Bethesda could vary the speed at which character's run, aside from maybe equipment and encumbrance modifying your movement speed (Wearing heavier armor slows you down.) so if everyone has to be just as fast, I'd prefer the running speed to be somewhat fast-ish but not unreasonably so. Of course, it may also be that they have some way of controlling character speed we don't know about, so we'll see. Of course, it may also be that the default running speed will be slower than what an average speed would be in Oblivion to balance out the addition of sprinting.
This is exactly my concern with this, and is a fine example of the sort of thing I'm talking about when I rant about Beth replacing game mechanics with gimmicks. They come up with these gimmicks, like the sprint button (or like sigil stones in Oblivion), then they hit a snag. If they allow players to increase speed like they did in past games, then if sprint is a straight increase in speed, sprinting from a high base speed would be ridiculously overpowered. But if it had a maximum imposed, then sprinting would have diminishing returns and would potentially be completely pointless at the highest speeds, since it would be only minimally faster, and perhaps not faster at all, then the base running speed anyway. The solution? Gimp speed so that sprint is still useful but not overpowered. Exactly like they gimped enchanting in Oblivion so that sigil stones wouldn't be either completely useless or ridiculously overpowered in order to make them still useful when compared to high enchanting skill.
I suspect that it will be exactly as you say in your last sentence - that running speed with be fixed and will be relatively slow, specifically to make the sprint button useful while not being overpowered. Screwing over an existing game mechanic in order to compensate for a gimmick. Again.
If the game actually had speed in it, I could agree, not because I like moving slowly, I don't, because I like the satisfaction of feeling that I'm actually becoming faster as I raise my speed, in Morrowind, while the starting running speed was slow, at high speed and athletics levels, it increased dramatically, and the effect was quite satisfying, if speed will be constant throughout the game, though, I don't want to spend the whole game feeling like a turtle.
I agree with this 100%, but I've resigned myself to being an a distinct minority on that. It's the same reason that I liked the fact that you didn't always hit in Morrowind (though it certainly could've done with some more believeable ways to express the fact that you didn't always hit - swinging and appearing to hit but not hitting was indeed irritating). I like starting out with a character who's not very good at things (which would be the natural result of low skills, which is, after all, what you start the game with), specifically because of the sense of accomplishment it brings when the character gets more skilled and thus better at things. I'd like a character to start out at least slow enough that it strikes me as being slow, specifically so that I can feel that he's improved when he's no longer that slow. It would seem to me that that's the obvious way to do things in a game in which the whole idea is creating a character with a base set of abilities, then improving them over time. If they start out high enough that they don't need to be improved, then what's the point in even being able to improve them?
But then we're back to fixed speed. Instead of rearranging things to provide room for improvement, just dump the whole improvement thing entirely.....