LOL!
I don`t think you get it.
It`s irrelevant if past GDP is revised up since we know what the old standard was as in core GDP.
In Obamanomics 101 we now include Imputations,redirections, R&D,etc. R&D counted before as simply final product sales, now it`s double counted. Imputation/redirections are pure works of fiction.
http://www.bea.gov/faq/?faq_id=488