Only two years, seriously? Based on the USAF hours requirements,
Has anyone who wasn't an uchideshi gone from shodan to nidan in a two-year timeframe?
Grading to nidan after 400 days of practice, which means two to three years after shodan, is quite "normal" here.
(Than at least three years to sandan.)
I think it's the usual timeframe because this is the time hombu requires and the grades of most aikido associations in my country are given directly by hombu.
Is there a certain reason, why it takes so long (compared to hombu) in the USAF? Do other organizations in the US use the same timframe?