100m/min is really flying, a typical cut is way slower, in the neighborhood of 10, 20 or 30 m/min for one two or 3 flute tools respectively at around 18Krpm. So by vector speed you must be referring to no load rapid travel. This is most often used in going from park to start, finish back to park between cuts and the bigger one, tool changes.
If so, then it depends on how much production you do in a day, what your tool strategy is, what type of tool changer you have (static or ride along) and how often you change tools.
Nearly all shops who operate CNCs run the machine sporadically, myself included. Anywhere from 5 to 25 hours per week on average I run 20 typically in a pretty busy commercial shop. The total times added for a slightly slower but still pretty fast (68m/minute is still way faster than a typical cut) is negligible for me and most people. You might be able to shave 20 seconds off an 8 to 12 minute sheet with a faster rapid if you have a static tool rack. If the tools travel with the head, even less.
I think this all speaks to the robustness of the drives more than a real time issue. If you are a really high volume production shop, maybe it is an issue, but a lot more comes into it at that point.