Ooh need to defend myself here! I've only done contracts on parents insistance - the first had seen 4 CMs and a nursery, and was really sure of me and so happy they wanted their lo to start the next morning.
The next was desperate, had seen 2 she didn't like but needed care for monday (it was thursday before) as it was I had to contact other people so she didn't sign till next day but she wanted to do it same day.
The next one I was the only person in the area doing unsociable hours so they said they didn't have a choice, and wanted the lo to start that night.
The next one I'd talked for about 2 hours on the phone and we'd really bonded. After 15 minutes in my house she said she was very definate, and wanted to sign. And said she wanted to pay me more than I'd asked for.
The last, had seen 2 others. Came to me, lo settled in, and again wanted to fill them out.
I always tell people to go away and think about it, but usually they won't! Sadly I'm not in the position to have people fighting over me, there's around 60 CMs in our tiny town!