The fact that Steve has had very little success in the the US says the most. They don't fall for it over there. He's a dime a dozen. It's just the tired old American hobo myth watered down and sold to a European audience and most lap it up because they don't know any better
I'm not sure a lot of the people who bought Steve's records even heard his schtick - they bought them cos they saw him on Jools Holland. And I think you're seriously missing a different point: that you don't have to believe a story's true to enjoy it. Bob Dylan told a million lies. Woody Guthrie told a fair few. People liked hearing their stories anyway.
Both America and the UK routinely 'falls for' a million myths about authenticity in music: in hip-hop, country, blues, whatever. The commercial end of hip-hop and country are industries built almost ENTIRELY around them. It's plain stupid to suggest otherwise.


I thought I knew my blues, I've only ever heard of one of these...

phew myth restored!