I asked some weeks ago about Twitter experience regarding AdSense.
Now I have this experience.
Created about 500 targeted follows, got 120 followers,
this converted in about 40 visits to my sites
and 1 click.
Because my sites have many different themes,
I tried 4 different waves of tweets, followed by making targeted follows for this themes.
But seems for the majority, the 140 char long tweet is enough, no more information required.
Google Analytics show Twitter users compared to the average visitor
34% shorter visits
22% higher rate to go away
48% less page views per visit