I'm happy to be open minded.
That said, the quality and echoey nature don't really underwrite validity.
When I used to tape gigs with a walkman down my codpiece, I could understand hiss, and distance from the mic etc...
Technology has moved on. Unless this is cited as covert recordings of a practice session recorded for nostalgia on a walkman pro - then perhaps.
I would think the bare bones demo would be presented on a clear sounding recording with probably some digital device.
I also suspect, judging by the brief time Boz was in France recording the album that a bit of ground work had been done prior.
Even if this is some of said, it's still one of the worst recorded demos to appear since click track et al. Even if it was a dodgy tech guy sneaking a demo recording - a basic cell phone would capture better sound.
My 2 penneth.
Regards,
FWD