to me Ratings of products are like polls for politicians...They can be made to say anything they want. Also like reviews at Newegg..90% are just silly and make no sense. For example the 90CFM rating. Is that in actual use, in a vacuum, under ideal conditions, at what voltage? etc...I have no clue so I take things like that with a grain of salt. Personally I prefer to find out on my own and by word of mouth that I trust. What I do know it the fans move plenty of air, are very quiet and the blade design is the coolest one I have ever seen.