I'm assuming this survey was only for coach awards. Right? Which, of course, we all know is not the only way to search for awards as sometimes restricted Biz or FC awards are available when restricted coach is not on a given flight. This survey is just pretty useless, IMO. Too many variables that are possible in a search for awards and too little information given to us in the results.
But I guess with any set of statistics one can draw any set of conclusions.