I think someone who owns these needs to do some BPS tests - especially on the loaders with various settings.
For example, I was trying to figure out how many Qloader pre-winds I will need to have it keep up with my Tac One (RT at 1200 psi) - no such info on the internet, at least when I had last searched. I'll have to basically guess and check with different pre-wind settings (plus, I don't actually know how fast it fires as of yet - I don't own a chrono).
I figured it would be good to know for other loaders as well, such as the Empire Prophecy I picked up - it has 6 different motor speeds which can be tuned - plus it has a tension detection method (don't remember the details), but this slows the ROF somewhat, from what I read. The magnetic clutch can be adjusted for brittle paint (softer), but a stiffer clutch will also increase feed speed.
If somebody with a high-end electronic marker could change their settings to cap ROF at certain levels, then test to see if the loader keeps up, then we could determine the *minumum* required settings/loader to keep up with the marker. This way, it could use less batteries, or in the case of the Qloader in particular, be gentler on paint (more prewinds = more tension on the balls).
Of course, I'm sure small things could affect these tests - they would have to be done with fresh batteries, the same brand of paintballs (from the same batch as much as possible), etc.