I think what happened is the first set of stuff dataminers looked for was cleverly hidden, specifically Pokemon base stats. At that point we assumed they scrubbed it pretty well. Then they found the more "interesting" information.It's so weird. I kept hearing praise for how well they scrubbed the demo clean, and then just. "Ah shit, hang on for dear life, leaks incoming!"
What the hell went wrong?
I mean, all this news about datamining is only a few hours old anyway. We don't quite know how well it's hidden yet.