Just to put it into perspective, the course was the H10/8, up and down the A31 between Farnham and Alton. My best-ever on there is 21.56, done on a day circa 1992 when a young Rob Hayles, Commonwealth and World Champion on the mid-2000s did about 20.25 to win the event by over a minute. That was a good fast day.
However, yesterday was by no means fast. Dowsett's ride was fantastic. Hutch is current 10,25,50 and 100 Champion, current 10 record holder with 17.54 (iirc) and has been 10-mile champion for the last 6 years! Beaten by nearly 3 seconds per mile is staggering.
Watch out Spartacus .... 2012 may not be how you expect it!