It all depends on your niche and whether or not you get smart priced. I have some that pay over $6 a click, and others that pay .10 cents. When you first put adsense on a site it tends to get the highest payouts which is then subjected to a decrease when google gathers enough data about your quality of traffic.
I don't earn more than that on average, but I have already earned more than that for only one click. It's better to see how much you earn for 3000 clicks.
There were times I got 1.5$ for a single click but as others say you have to wait to see long term results
I second Senserely's opinion. With low amount of clicks, this happens very often, but with huge traffic sites, CPC is much lower (unfortunately...)
in my life I got maximum $2.41 for 1 click. that once . but my stock site always gets good price. recently the payment for each click on my flash game site also increased.