Our home is at Hampton Lakes on US-27 which is slightly further (one mile max.) than Davenport Lakes and it takes us 12 minutes to reach WDW. There's a map on my site which will give you an idea of the area.
Interstate 4 is the quickest way to get into WDW since there are dedicated exits off I4
...and no, it doesn't have to be a good day, with a following wind and no other vehicles on the road to get there in 12 minutes.