Amazing about the comments is that while a majority seems to "deliver" when the pressure is on, they split 50/50 on whether they feel great during it or suffer greatly, no middle ground.
I'm definitely in the 2nd group. I can get it done if the alternative has horrifying consequences, but it's not a good feeling.
Maybe two things are mixed up, though. One is like a thing where not doing it is horrible, such as vet appointment for the pet, crucial last deadline at work, kid's birthday party. The other is like working in a high stress environment, like a project where everything is on fire and under pressure, it's not about our condition, or an emergency situation like a sinking ship.
I, personally, suffer greatly in the former, but less than the average person in the latter.