Simply put, it doesn't square with my experience at all. I'll conduct a survey down the pub - we have a broad spectrum of people propping up the bar on a Friday night, from brickies to logistics managers.
I suspect that the sampling for this survey is a prime contributor to the results.
Perhaps it was done by a confused field worker, who was in [link|http://maps.google.com/maps?f=q&hl=en&q=birmingham&btnG=Search&ll=33.520556,-86.8025&spn=2.894193,6.943359|Birmingham] and not, as they should have been, in [link|http://maps.google.com/maps?f=q&hl=en&q=birmingham+uk&btnG=Search&ll=52.482921,-1.893619&spn=0.264282,0.86792|Birmingham].