IDK... I think it depends on the girl and situation.
I usually text them immediately, when they're in front of me. That's just cuz I tell them to text me really quick. I'll text them back, saying something like, "just wanted you to have my number. But I consider over 9 texts a day stalking.

". Then I'll ask for her phone and hand her mine...... and say, "okay for a contact I'll put, Awesome snowboarder dude (or something pertaining to our previous convo.. ie "Handsome 80's Music guy") and snap a pic of myself... Than ask her what she put herself for as a contact in my phone.....
I can't remember where I learned that routine, but I like it. I think it might have been in the Ultimate Guide to Phone and Text Game.
I think, generally, one day is enough to see if she's gonna text me first. No matter how long one waits, it's gold when and if they text you first.[/quote]