Honestly, I pay more attention to the bar anyway, than the numbers. How much has been done and how much has yet to be done, it seems, is easier to calculate and more to the point than guesstimates at how fast the task can get done. Although I do appreciate it when Steam warns me that a game is going to take 6-8 hours to download. It usually doesn't actually take that long in the end, but I like to have an idea if this thing is going to be playable in a few minutes or if I shouldn't plan on getting to it until either the evening or tomorrow.