Here are a few other facts to consider:
1. McGuire seemed to be installed as the # catcher after the trading deadline last year, and I'm fairly sure most people here expected him to be the #1 this year.
2. McGuire has much better offensive numbers than Wong.
3. Wong has started 12 of the last 18 games, including games against RH starters.
So maybe, just maybe, the team has somewhat rapidly adjusted its thinking on which one is the better defensive catcher. Regardless of what the conventional stats are showing.