I actually disagree with this. I have found through experience that my Android phone gets me closer and more accurately to caches than a traditional GPSr does.
While chaching with my friend, his Vista HCx will never have better than 10 foot accuracy. My phone will get me 5 foot accuracy. This is even better than WAAS accuracy when using Assisted GPS cell towers to find locations.
It is funny, but I can always tell when someone used an assisted phone GPS to place a cache cause my phone takes me right to it with perfect accuracy. When a traditional GPSr is used, the coordinates are always off by 10 or more feet.
The app I use for Android OS is actually not permitted to be spoken about here on the forums. It is by far the best app there is and the live map feature is incredible.