This is most, but not all of the article (I hope I am avoiding copyright issues, if not please delete)
Not much in the way of evidence quoted, but I assume there is some. For what it is worth, I find myself going quickly when I feel i am on a dangerous road. Probably in order to get off it and on to my preferred backwaters.
"Slow cyclists are three times more likely to be hit by cars than those travelling at high speeds because they are “less hardy”, according to research.
A study found that cyclists travelling at 8mph or below were involved in a far larger number of traffic incidents and near-misses than those riding at 12mph or above. Researchers suggested that faster cyclists may be treated with more respect by drivers and subjected to fewer overtaking manoeuvres. Slower and “less hardy” cyclists may also be vulnerable to near misses, it was claimed."