In case people were wondering, you can submit when ever you wish. I got through as much as I could afford to and left the rest blank. It still takes it.
You can always skip some questions, which IIRC is stated upfront. Or if you don't mind it leaving a cookie you can submit partially filled survey, and return to it and fill the rest of it later (which was stated in the message after filling and submitting the survey).
If you're thinking, 'Boy, to finish this I'm gonna need a cup of coffee, but those Git people will surely appreciate my finishing all 65 questions', stop right there.
"Your session has expired because you were inactive for more than an hour. You may return to your account."
This supposedly got corrected. Session cookie expiration is now 3 hours, and page uses JavaScript to keep cookie fresh, so it shouldn't timeout if you keep it open.
And you can always submit it, and go back to it later to fill the rest.
