It depends on the traffic you get. For me, it takes me 3 months to get this, but for many guys in DP, they earn this just within 1 day.
Yes, it all depends on the number of sites you have adsense on and how much traffic they get. It took me 6 months for my first $100, but now I get that about every 3 months. It also depends on your niche, how much competition there is, and what the advertisers are paying for that niche.
Well if you don't even know how to write a proper Title (Help me !!) in your post, i guess it will take a very long time to reach $100.
it depends, in dp there r members gaining 100$ for an hour and other spend 2 months to do so. its all about traffic.
Everyone can earn lot of money via adsense, all you need is traffic. Traffic = $$$ Just improve your search results ranking, build backlinks, increase the traffic, the earning will increase too.