Alt-Tabbing Significantly Slower These Days?

I'm wondering if anyone else has noticed a substantial lag in alt-tabbing these days. It used to be the case that, if I'd died, I could pop out of the game, move the YouTube ad over to the video, and alt-tab back in before the timer was up.

Now it feels like there's a good 10 second delay in each direction. Wondering if that's on my end or a universal issue.