Is a White Shepherd still a German Shepherd?

Yes...and no. There are purebred, registered German Shepherds who happen to be white. However, under the AKC they are disqualified for showing in the breed ring. This led to a movement to create a separate breed called the White Shepherd (as opposed to the white German Shepherd) under the UKC (United Kennel Club). There was a period of time when a registered white German Shepherd could compete under either breed, but I believe they are now considered two separate breeds. Owners of white German Shepherds had to choose which they wanted their dog to be. Part of the reason for this split is not just about color. On average, White Shepherds have more of a traditional look than modern AKC show German Shepherds. White Shepherds have level backs and are not over angulated, going back to what the German Shepherd was in the 60's and 70's.