The article posted already, has a video of his strikeouts today and they clocked one of his fastballs at 96 mph.
http://m.mlb.com/news/article/179759404/blue-jays-jon-harris-extends-scoreless-streak
High strikeouts, low walks, and low hard contact % are all things pitchers can control. They remove fielding and luck from the equation. That's why we're so hyped from the strikeout tick.
If the offense doesn't show up for these series, it better be the end of the "it's still early" excuses. By the end of this stretch it will be June 5th, two months in.