Bizarre. I just started having a similar problem a couple days ago too.
1. Going around a 60mph onramp, WOT in third I felt a lurch and got off the gas. No CEL.
2. Shortly thereafter I did a WOT pull at about 55mph in third. The boost appeared to pause going through 14psi then continued to build. Felt the lurch again at 20psi and CEL began flashing for about 5 seconds then gone. NO STORED CODE.
3. I just reflashed my base map (protune) and tightened the intake hose clamps that I could reach. Went for a 2nd gear pull and got violent lurching going through 7psi or so. It feels like ALL CYLINDERS are missing at the same time. Flashing CEL for 5 secs or so Then gone.
I'm almost wondering if it could be clutch slip and grab causing the issue. When I started up cold today my clutch judder was twice as bad as it's ever been. Off to clean the MAF when it cools down.