Conditional for "length" (fx. number of words) for post?

[Marvin Hlavac]

I display one unit of AdSense per showthread page, right bellow the first post on each page. My original intention was to move the position of the ad to bellow the second post if the first post was too short. However, in the process of trying to figure out how to achieve it, I have changed my mind a bit. Instead of doing the above, I decided to not display ads at all on pages with fewer than three posts. I have managed to achieve this. I will leave it as is for now. Should the income drop considerably, I will revisit my original plan.