Am 11.01.2013 00:12, schrieb Clive D. W. Feather:

147. A 2011 study suggested 30 per cent of passengers take longer routes
due to the out-of-scale distances on the Tube map.

I'm very skeptical of that claim.

It may be true for the isolated case Paddington to Bond Street via Baker
Street/Notting Hill Gate: "Although the second route is considerably
slower (by about 15 per cent), some 30 per cent of travellers chose it,
Professor Guo found."
http://www.dailymail.co.uk/news/article-2000847/30-passengers-longer-routes-Londons-Tube-map-misrepresents-distances-stations.html
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Kai Borgolte, Bonn