It's amazing how much of a classic bell curve there is, if you look at the segment from 2:5x to 5:5x (i.e. for all interval classes where there are at least 1,000 finishers), centred around a mode of around 4:2x I guess. I would've thought it would be more skewed with a long tail.
Misleading comment of the day from the article...
"Ever wondered if you were born in the wrong century? A breakdown of finishing times for last year's London marathon shows that 992 runners finished in under three hours. A time like that 100 years ago would have ranked them among the fastest runners in the world."
Ummm, yeah - so not many people ran marathons 100 years ago. How about comparing the proportion of sub-3 finishers in the race with 25 years ago? 
Edited: 02/05/2012 at 10:40