The 120mm version is pushing 40.6 CFM at 15 db with a max pressure of 1.07. Silenx is pushing 44 CFM at 12 dB and Scythe is pushing 40 CFM at 10.7 dB. Nothing record setting, but it's better than everything else Newegg sells in that range. Can't comment on the pressure, since neither Newegg nor the manufacturer list the spec. You'd think a news site could do some research. I miss the early days of this site.
The 4000 RPM is correct according to their website, and it weighs in at 18 dB for a mighty 4.53 CFM. Someone once measured the cooling efficiency of a 1u server from a major vendor with all the 40mm fans. It turned out the fans drew more power than the rest of the computer. Maybe that's why Google doesn't put case fans on their servers.