He did my 2011 ZX-10R and just did my 2013 ZX-6R and soon my 2015 H2.
The 10R was a beast, was my track bike and was really too much bike for me at my skill level so I sold the 10R and picked up the 6R. I purchased it and immediately started prepping it for the track and right now I'm waiting for forks to come back from Racetech. I had the ECU flashed before riding it so I have no idea about the difference between stock and flash. What little I have rode it so far it appears to run very strong, still only has a couple of hundred miles on it and need to put some more on it before hitting the track. I can tell you the low and midrange is impressive. I can't wait to open her up on the track.
By the way I would not get hung up on dyno numbers, Don knows what he's doing the bike will perform up to it's maximum potential when he is done.