How Long Should It Take To Rank Well in Google?

A WebmasterWorld thread asks how long does it take to rank well in Google? A good question, but typically, a new site might rank well in the short term and then drop off the radar until it begins ranking again. This is sometimes known as a temporary PageRank feature of some sort.

So let me poll our audience, you tell me how long you think it takes to rank well in Google?

Forum discussion at WebmasterWorld.