Great article, I can confirm everything you said!
What also works great (for me at least) is having 1 or 2 pics with a/some cute girl(s) (an ex-gf or a friend, doesn't really matter). This also improves your social value, basically it's the same as when you enter a club with some hot chicks vs. entering a club alone. It sparks a kind of natural jealousy in the ladies since they think: "Wow, he knows some cute girls. What do they have that I don't have?" or "He must be a pretty cool guy, girls obviously dig him".
I've had many girls initiating conversations with me on Tinder becuase of that. They start chasing you instead of vice-versa.

About the texting skills I will just add one thing. It helps not to text or reply asap (wait 5 mins or even an hour) or it can demonstrate neediness (which is an instant turn-off for girls)