It takes a lot more pressure or confusion to get Brady to look scared and rattled than Gabbert. No QB is impervious (I feel like I might be using this word incorrectly) to it. And then to add on, the better QBs can bounce back better than the worse QBs. That's why getting a Brady, Brees, Peyton to play poorly all game is nearly impossible and if you do it, it's amazing.