No Al Blaha never used nitrous. He also did this over 3 years ago.
He isnt the only that have done it. He is just the fastest. People have so many options now that no one pushes the 1g mas to its limits anymore.
Your mystery person holds no water so how can anyone consider it. The ability of the 1g mas is no mystery to those who know what they are doing. It just works and you can tune with it alone.