Lanefan
Victoria Rules
Correct, to a degree. If it's open space movement with no nearby combat then yes, you can go a lot farther in 30 seconds than you can in six. But if you're having to dodge other combatants and squeeze between flailing weapons then the current move rates are probably too generous anyway, and while you could still go farther in 30 seconds even under those conditions, it wouldn't be as much of a difference.Changing the time of rounds should affect the movement scale. You can run a lot farther in 30 seconds.
Another thing to consider is the round length can be a malleable thing depending on the situation and-or type of combat. For ship-v-ship naval combat I have rounds be about three minutes each as it takes that long to reload the artillery and-or maneuver the ship into attacking position. Conversely, if a combat is being done entirely by psionics (very rare, but it can happen) then a round might be less than a second long, as I've always had psionics work at the speed of thought i.e. bloody fast.

30 seconds is just a default.