It worked! I'd hug you through the Internet if that was technologically possible!
I'm getting a stable ~30FPS on Majora's Mask on 100% JPEG quality and no bandwidth throttling. Actually, I can get up to 45FPS on 10% JPEG, but the results speak for themselves:
As a side question to everyone: Is it possible to disable JPEG compression at all? There's visible JPEG artifacting even at 100% quality.
Yes, that's normal. I think that the BootNTR app is somewhat separate to the actual NTR CFW. It's a utility that boots you into the CFW, but the CFW itself is at 3.4, whereas the latest version of the booster is 2.4.