Superbowl add does it really get sales?

http://www.physorg.com/news/2012-01-super-bowl-advertisers-tv-ads.html

This was very interesting cause they were talking bout does spending all that money on Superbowl adds really get any more sales? Also with them always showing clips online of the add before it is aired. There are better ways to get your add out there than these expensive adds which may or ma not work. They may stimulate conversation but sales probably not.