[asid61]

If you say you are faster with a riveter than with a nut and bolt, what if you had practiced with a nut and bolt and were more used to it than a rivet?
What I'm trying to say is that it's the cap on speed that matters, and a 1v1 test may not be perfect depending on experience.

Mainly for less-strong stuff and stuff we don't remove we use rivets. For stuff that needs to be stiff we make sure to have a lot of 1/4" rivets.
For removable assumblies (like our elevator this year) screws offer and advantage due to better accessibility; we can't exactly rivet something out 1/2" from our bellypan! So ti saves us space.

Maybe it's just the way we put on rivets, but they don't tend to work well in tension for us, and we need many to keep ourselves stiff and not loose.