:I definately thought that Jack was working as part of a greater organisation whilst in the Torchwood series (and that the London office was still there (being rebuilt) along with other offices.  
 :Jack's comments to the Doctor made me think otherwise. I would assume he has been involved with them on numerous occasions in the past but took over following the battle of Canary Warf. However my impression from his comments was that his team was all there was.  
 :Perhaps this means as far as the Torchwood that the Doctor knows about is concerned.  
 :The other Torchwoods could do other things (research and development, prisons, archives etc etc.) and be run by folks known to Jack (who is the weird old-guy running the Scottish branch (Leighbridge-Stewart??) blah, blah its all speculation. What isn't speculation is what Jack said. Maybe "confirms" is too strong a term. Perhaps we should simply say he "states" that Torchwood etc etc.