Getting a girls number means nothing, they give out there numbers all the time, in the 90's getting the number was a great achievement now its just another hurdle to jump. plus now with the iphone 5 new software you can block the caller, which is the best thing ever.
you need to have game when you get the number, some guys will text her daily and call daily and leave 3 voicemails and totally write themselves off.
in the 90's if she have gave you her digits then you had a 70% chance, now it means nothing.
Today if her friend said "Jen thinks your hot, you guys should hook up, heres her number" then the 70% chance rule is valid.