Hell yeah, one of the first thing I removed along with FB and Titter (intentional typo). Face recognition simply does what it says on the tin, it does slow down in it's battery consumption but will still eat battery.
Think your confusing.face recognition with the proximity sensor! You can tag a picture with a name and the phone uses face recognition to marches other pictures the person.
thanks JJ, uninstalled it, i have been hesitate to uninstall any applications with the android logo on it, was wondering if there are any other applications which are not useful and can be uninstalled that have the android logo?