Ha, I’m glad you had such success. The more generic your audience requirements are, the faster the responses come in. And if you don’t specify any demographic, it can be real quick. It’s funny that the timing matters too. Posting surveys on a Friday night, you don’t get them in so quickly.
I posted a survey needing people to test an android app, and it took like 24 hours to get 12 people to respond. Much longer than something broad.