Well, yes. But he didn't do much of anything in that game except not crash the car. He did better than I would have expected given the lack of prep time & snaps, etc. But if I had to guess I'd guess that Hoyer wins that game if not knocked out early. Zappe showed me more than I would have expected both weeks, but a long way from delivering on what Mac can bring to the table.
Mac is doing fine. He's pushing more this year, which is good, and the game has to re-slow down for him. Some of the INTs don't fall on him, though there are at least 2-3 that should have been INTs but weren't. You know when you stopped always checking your blind spot because you were subconsciously counting cars when you flicked your eyes to your rearview and side mirrors? Remember the first time you were wrong and terrified to find the car in your blind spot that you'd missed? That's kind of like what he's going through right now. He needs to "count cars" for those underneath LBs subconsciously, knowing that they're there (or are about to be there) even when his sightlines are blocked. If he's reading cover 3, there's a CB dropping into the deep third (or a S sliding over) to take the deep sideline away, even if he doesn't seem to be in that position right now.
...and he needs to keep building up the arm to shave that 1/8 to 1/4 second off the time that the ball is in the air.