Yes, I was getting the P0340.
The task is complete. I was able to replace both AVCS devices and both cam position sensors. It was not the most difficult task, but it was mildly annoying. A healthy dose of dielectric grease was used on every electrical connector that I could get too.
While doing this one of the PCV hoses decide it hated being in 1 piece and decided to break into 3 pieces. YAY! New hose was installed and new worm gear clamps were gifted wherever possible.
The result? Starts and idles perfectly. Warm-up is normal. Driving at low speeds and low RPMs is normal.
And then we get to the dreaded highway... Not only was the power delivery smoother, but it was more consistent! I was doing a data log purely for the sake of it as well, just in case something went awry. It hit 15psi - stock turbo, Cobb 3-port boost control solenoid, and stock everything else (both cats, 100% of the exhaust, etc).
I have to say, this is absolutely the best it has ever felt! It has to be noted that this was only a 3 mile drive in total. I'll be monitoring it and report back at the end of this week if anything changes.
Word to the wise: If you're going to replace the AVCS devices, it wouldn't hurt to replace the cam position sensors at the same time.
I had to pull the battery out (easier access), so the ECU was reset.