Just heard a remarkable comment on the cycling coverage from Anna Meares - saying the women's sprint times have come down about half a second since her last competition in 2012.
In 2012 the fastest sprint in qualifying was Victoria Pendleton in 10.78. So it's a pretty similar length to the 100m in athletics. Which, for the women, hasn't been touched in something like 30 years. Can you imagine half a second coming off it in that amount of time?