When we stayed on Sunset Lakes we found a way to be at Animal Kingdom within 5 minutes. A lot depends on where you are going. Magic Kingdom took a little longer because it's further up World Drive.
We personally prefer to stay on the east side of Disney as we find it's easier to get to Sea World and Universal. We also like going to the nice restaurants on Sand Lake Rd and they are much easier to get to from the east side.
We always rent a great house on Cumbrian Lakes now and we find it takes about 10 minutes to get on Disney property. Since they widened Poinciana Blvd it's much quicker...thankfully the roadworks that were on there during last years stay were gone a couple of weeks ago when we were there again.