Apple doesn't give out any information to case makers prior to the release of a new model?
They will share information with certain 3rd party vendors - taking necessary precautions to assure non-disclosure. But that doesn't mean they just hand out specs to anyone who's interested. The $9.99 case makers in China have to wait for the official release as do other smaller vendors. You can only keep things secret by limiting access. The likelihood that this guy was "in the loop" is nil.