These are basically all comparisons of rates, which are things per unit of time, just like speed is distance per unit of time.

This is a comparison of speed, not time. A comparison of time would be:

I ate pizza on Saturday. My friend ate pizza on Tuesday. Did I eat pizza three days *faster* than my friend? Earlier, perhaps, or sooner, but not faster.

This is likely a comparison of words per minute, which is a comparison of speed, not time. A comparison of time would be:

Yesterday, I typed for an hour. Today, I typed for half an hour. Did I type *faster* today than I did yesterday? Well, that would depend on how much I typed, wouldn’t it? Time alone isn’t enough to make that determination.

Back to cycling…

If I am riding at 15 km/h and you are riding at 30 km/h, I think we can all agree that you are riding 100% faster than I am. But, when we get to a segment on Zwift, if it takes me 6 minutes to complete the segment and it takes you 3 minutes, you are now only going 50% faster than I am?!?