Corrollaries;
- high price does not always ensure quality
- you don't have to spend ridiculous sums of money to find a high-quality speaker...
There are many brands that are known for their performance for the dollar that are not off the charts expensive. Check out Legacy and several others mentioned with alot of devotion from their owners on this and other forums.
The BBC article is a good one though and although a bit predictably, using a major UK manufacturer as an example (B&W, one that I respect and like their offerings very much...), they do 'lay it out there' in a fair amount of detail. They do however seem to shy away from actually defending anything above the top BMW's price point even though they mention the upper-strata priced speakers at least once or twice as a reality of the audiophile world.
Personally, I think alot of manufacturers in the high price ranges over-price their speakers (and components!) and while they should command a premium price for those that ACTUALLY perform better (not all do), I do think they've "hit the bowl or bottle" a few too many times :-) and overdone it. My 2 cents...