I have been testing adsense with different position. My results are bad. How many days do you wait to try something better.
If you get 2 uniques a day, wait 6 months. It's about significant exposure and data to analyse, number of days have little to do with that. So it depends on your traffic.
I wouldn't measure it as how long. Wait till you get 1000 page views with the ad in one position, then change it, wiat for a 1000 more views and compair the CTR.
It is one complete cycle. Now cycle varies publisher to publisher. And you must know what is your earning cycle !!!
it takes time and i wouldnt say its going to happen over night either. i would say test ti out for a week or so
I usually don't have more than 3 very good or very bad days in a row. A week should be more than enough to gauge how the new positions are doing.
if you get 2 uniques a day, why you even put ads in your site ... go care about the traffic and forget about the ads for a while ...
You have to decide what kind of data you want. But Anything between 100-200 is good enough to make a wild guess. 200-400 is great. I will never make mistake to wait for 1000 unique visitors. Rather than I will take 100 and make a guess. It still give me 10 times to make wild guess. And To my best Knowledge i have craked it within 3 or 4 try. Nuttymarketer