(http://insidesearch.blogspot.co.uk/2011/11/search-using-your...)
> we found that users typed the “+” operator in less than half a percent of all searches, and two thirds of the time, it was used incorrectly.
Check my arithmetic but that means only 1 in 600 searches used + correctly; 2 in 600 used it wrong, and the other 597 searches didn't use it at all.
(http://insidesearch.blogspot.co.uk/2011/11/search-using-your...)
> we found that users typed the “+” operator in less than half a percent of all searches, and two thirds of the time, it was used incorrectly.
Check my arithmetic but that means only 1 in 600 searches used + correctly; 2 in 600 used it wrong, and the other 597 searches didn't use it at all.