Importance of your display pic

I observed something really interesting today... I have 10-15 orkut profile visitors on an average day. On the eventful day of 02/11/07 (when I changed my orkut display pic), I had 113 visitors!!! 30-40 visitors is alright but 113 just due to a new pic?!?!? Anyways, lesson learned: If you want people to visit your profile, change your display pic.. :P