Universal
Of course it's not confined to America
http://www.badscience.net/2009/07/we-are-more-possible-than-you-can-powerfully-imagine/
10 publicly visible posts • joined 18 Jan 2008
Every car ever built is made from bits that are "about the right size", it's called tolerancing, you do it to every single bit & then work out wheter or not it's likely that all the bits will still fit together. The Japanese dominated by working out which expensive bits didn't need close tolerances & which cheap bits did
Given the only FM station I can receive where there's an audible difference in sound quality on a decent receiver is Radio 3 & that's hardly the most popular radio station in the country then it seems unlikely that the quality is preventing people buying DAB.
& the Pure Highway has better reception than any FM station everywhere I've driven recently.