My top 14U players home to first time is about 3 seconds. I consider anything under 3.2 to be fast and 3.3 - 3.5 to be the average. Anything over 3.5 would be slow. For a 9 YO I would add about a second to these times. On the low end your DD's speed would be considered average and on the high end slow.
DITTO.....would also like to add that anyone who runs a sub 3.0 second home to first is FAST!!! Fastest players we have seen run @ 2.8 in A-level 14U TB. Clocking a girls time is a little like hand timing football players in a 40-yard dash - a coach can cut the time significantly with a late start trigger and quick finish trigger, so take everyone's claimed speeds with a grain of salt.