i never think about how long to wait... although im a girl. if i have someones number i thank them when i get home for a nice evening, if i want to see them again, and then say hope they got home safe.
just think its polite. when a guy txts me the next day i think- o im on his mind, which is nice. so long as its not constant txting. thats a bit....too much.
overall i dont think u should wait, if u want to txt her then do.