1. 1. A computer-implemented speech recognition system, comprising: a microphone that receives user speech; a speech recognition engine coupled to the microphone, the speech recognition engine recognizing the user speech and providing a corresponding textual output on a user interface; a change recognition component that automatically assigns a categorization to a user-initiated change to the corresponding textual output, wherein automatically assigning the categorization comprises automatically assigning based at least in part upon a measurement of time indicative of how long it took the user to initiate the change; an adaptation component that selectively adapting the speech recognition engine depending upon the categorization.