I've never been on one, but I imagine if I was my performance would drop to the absolute minimum. I love my job, but I come first. Hell, I'd even be applying elsewhere and taking interview calls from inside my cubicle.

I was fortunate enough to be part of a couple startups when I was younger that went belly up. I've lived through the fear. I don't have any now. Happiness and work/life balance above all else, even pay; not some manager's unrealistic deadlines.