FORECAST VALID 01/0000Z 20.4N 66.1W
MAX WIND 120 KT...GUSTS 145 KT.
It looks to me like Frances will make almost exactly that position, but at about 21:00 Z.
So that means that while they hit the position dead on, they were 50% too slow (9 hours forcast vs. 6 hours actual). Seems to me that implies more acceleration than going from 14mph to 16mph.

