I read this post and then bought the book; it's very good, thankyou and I've just ordered a set of vivobarefoot's to try 'em out. I wish I tried some £3 plimsoles first, but couldn't find any.
And I joined the army in 1986 and we were issued plimsoles which we called 'slaps', and I can't remember having any problems with them, but I doubt we ran more than 3 to 6 miles in them at a time.