What absolute crap. As has been mentioned already, different tuners aim for different numbers based on their engine hardware, experience and ultimate goal. Manufacturers (Subaru, Nissan et al) are notorious for releasing cars with ratios dropping at some points to low 11's to safeguard their fickle motors.
In short, get your car tuned by an expert, on a chassis dyno and make sure you have the right hardware to suit your purpose. e.g. S-AFC/pump etc.
Cheers.