Limerence is right by far: texting for me is far more preferred than phone. Most young girls hardly talk on the phone anyways. I can escalate to guarenteed sex through texts most of the time. You are able to gauge a girls interest, take a moment to say the perfect response, and use double entedres and sexual innuendos safer. You do have to have an idea of the girls level of intelligence though, as some just dont get higher-level thinking innuendos.
One pitfall is the TONE you are trying to convey, which means using emoticons. Seriously, other than

and maybe a selct few others, thats all you need. Maybe :/ which I use for confusion and

for "it is what it is" sort of thing.
Perfect example was tonight. I'm with a friend and we go to see her friend in her condo. Im with my buddy who is banging the chick I'm with. We go up to her friend's condo and look out over Fort lauderdale from 30 stories up. great view, great conversation. Its literally a 10 minute stop because she has to go to sleep and my friend was just dying to show us this view. So I grab the number by chatting up about the nifghtlife at the clubs we can see, and mentioning that I dj there occasionally. What type of music does she like? Could be country music for all I care (I play electronic, Breaks drum'n'bass dubstep etc) point is, whatever she says, Ive got great ____ music for her. "Take my number, shoot me a text and Ill send you some links" Ive found I give my number out much more than asking for numbers for several reasons: one, I see how interested they are and dont waste a MINUTE of my time, and two, it puts girls MUCH more at ease because they arent on the spot. Works for me. She texts me as we exit the lobby.
HB "hey, its _____, just wanted to txt b4 I went to sleep!"
me "that view was amazing! you picked a great condo. thanks for staying up to show me the view

"
HB "np! so do you play down there often?"
me "occasionally, I play more miami now. but I know alot of people there. maybe ill take you to ____ on friday, should be a fun night"
HB "we'll see (: " NOTE: ive noticed chicks are reversing the smileys now for some reason. whatever.
I left it at that. Points of interest: I compliment her on her view, which she has NO control over, but then something SHE chose, and thats the condo. She made that choice and therefore im complimenting her choice, preference, style etc. I can already tell shes interested because of her asking about me being there. And I leave it at her last text. Her putting that smiley at the end is a game they play. I dont say a thing else, and wont for a day or two. Shes interested, and its only monday. By wednesday Ill have her sending pics, and by friday day time ill be laying some serious innuendoes and double entrendres (a double entendre is something that has two meanings. for our purpose its something sexual and something innocuous, ie innocent or benign). But the great thing is, on wednesday, Ill know if I should even waste my time texting anymore. This feels solid to me.
Hopefully that sheds a little light on my experience.