Addendum dtd 3 October 2012 at 07:37 hrs:
I may have alluded or given an incorrect impression I am quitting karate all together. NO, I practice and train every single day. I just don't participate in dojo community oriented practice, i.e. with others on the training hall floor. I had a period where I solo practice about ten years ago and focused on both Tai Chi Chuan and Chi Gung for health, etc. then I went back to teaching and participation in a training hall.
I later stopped the dojo visits and started in-depth study on my own and through media such as the Internet web and blogging, etc. The studies included many, many readings of such books as Scaling Force by Rory Miller and Lawrence A. Kane - reading it right now. I may end up ending this particular physical side sabbatical in the future but the future is not known to me yet.
Being behind the curve in this instance is because there are many things that can only be vetted on the training hall floor with other folks. It is that set of things that cannot be done solo, ergo since I am not training with others right now I am behind the curve physically speaking.