YES!!!
I just recently did this upgrade (about 2 weeks ago).
First off, let me say that my original box was FUBAR. After swapping to the Drag, it was easy to see that my other one hadn't been working correctly for quite some time.
I called Edge and I believe I talked to Jason. I told him what I wanted to do and asked how long I would be w/o the box so they could fix/upgrade my current one... he said they understand that many guys' pickups basically will not run w/o their box (mine being one of them as it would be severly overfueled and underboosted w/ the DD3's) so he said he'd overnight me a new Drag box (free shipping of course) and include a return label for my old one. Well, three days went by and it didn't show, so I called back... turns out he'd accidently lost my info (closed a computer screen before saving) but still had my name on a note. I had one the next day after calling.
I'd say the biggest difference, and easiest to see, is in the EGT's... . they just don't stop now!! Before I could hold 1400* until 4th gear, but now they're past 1600 in 3rd gear lockup... guess that's what happens when it doesn't de-fuel.
I'll have a better idea tomorrow... will be installing a KSB1-B on a pickup identical to mine, and we'll run his regular Comp and my Drag comp on his to see the difference w/ a good turbo (not my stock HY).
For what it's worth... Josh