It looks to me that their dyno chart shows 393 wtq on 93.I'm also really looking forward to seeing some data for boost request and shaft speed in general, hopefully from this IE tune. Based on the compressor map and basic turbo calculations, you can actually overspeed this turbo at 25psi, 6800 engine RPM, and 500ft DA. What's particularly concerning about the IE tune is that in order to hit the 489ft-lbs at 4000RPM they are claiming for their 93 octane file, you pretty much have to be exceeding a pressure ratio of 3.7 (30psi), which is well into overspeed territory. So I hope they're just lying.
Also, what's your fueling situation? The car in the Stratified video was running MPI.
All the figures in the table look to be CHP estimates.