Okay lets not blow things out of proportion given the amount of people who left were probably only 2% of the stadium like others posted.
But lets also not pretend 2% of the stadium is only 50 people, it's still over a thousand people, and yes it's noticeable and embarrassing for the fanbase.
And yes I saw many people get up and leave right after the 4th INT. I'm sure there were a bunch just needing to get some air, use the bathroom, grab more booze. But I'm also sure there was a bunch that just gave up, because I even saw someone arguing with his girlfriend to leave with him (yeah I hope she kicked his ass after they left, since she had hope and he didn't).