Very interesting indeed. I think Mr. Larger has made quite an achievement. This bodes well for the future of this young man as far as our Aikido goes.
As a Shodokan Nidan myself I find it a bit hard to understand how he could have made Nidan so soon if he only participated in 2 classes per week, but it is very possible if one is as driven as Mr. Larger appears to be, and trains outside of normal class hours (something that I see as necessary for our Dan gradings). In my own interaction with my Sensei and one of the other JAA Shihan I have come to realize however that tests for Dan grades who have many higher-ranked Sensei in their vicinity and Dan tests for those who will take up the role of Sensei at Shodan or Nidan level tend to be quite different affairs.
Either way - kudos to him for a fine achievement.
LC