So... lol More testing done.
They are researching. Gepard67, I do not know why, but the dev.exe does not keep track of their credits spent on research, but if you watch their "live" cash flow, you'll see it drop each time a pirate raid spawns and then their stats will adjust, depending on what research they did.
Further, I have been able to test (more so for my own peace of mind) that what bonuses they're getting for the researches are not hard coded somewhere. I adjusted some of the research stats to ludicrous amounts and saw the appropriate changes on their ships when that research was hit.
So, that means they are researching my modified researches with the ExperienceConstantGainRate and ExperienceConstantGainLevelCap. It's just that, for whatever reason, they're not taking affect....
EDIT: Ran one last set of tests. I can verify that pirates do research added researches as well, and that at least the ExperienceAwardedAdjustment affect does work. As much as I hate having to rely solely on that (as a grav well defended by a Starbase and turrets/hangers won't yield much for experience right off to level the Cap ships up), it may be what I have to do.
Essentially, the whole point behind my trying to do all of that was because level 1 Cap ships are generally push overs... especially vers Starbases. So I didn't want the Cap ships that will be coming with later pirate raids to be (essentially) free xp to any Capital ships or Titans in the same grav well as a Starbase that just chews them up on entry....