Having spent this past summer traveling with my iPad I can vouch for the authenticity of this article. I didn’t go overseas so the language suggestions are the only exception in my experience.
Even though my iPad had 3G access I was cautious in my use of bandwidth and continually looked for reliable WiFi access–which was readily available for my entire trip.
While this article does not offer any earth shattering revelations it does provide a very good and practical overview for someone venturing out on a trip with only their iPad.