Testing the Three Click Rule
Josh Porter of UIE test the Myth of the Three Click Rule. Josh finds out that users will continue seeking what the want to find after three clicks as long as they feel they are on the right track and getting closer. Most users will not abandon their quest after three clicks as had been suggested.
Oddly I remember this three click rule from four to five years ago and when we tested it we found the users we tested did not give up. There were other studies at that time that backed up what we were finding. Now in the last couple of years folks that are new to the Web are pontificating the three click rule again.
As always it is always best to test and just follow blindly.