Yes, he did it!

So a girl on SciFi board confirmed: Jamie wrote "is from London + talks funny..." himself. :-)
And sticking to the point, here's a clip showing his reaction when again someone asked about his american accent in BSG. Heehee! Love his sense of humor and endless patience!

The clip was made by Damaris1 and she uploaded it to her site at this link: http://www.dc-media.com/images/jamie.mpg