That common sentiment is superficially reasonable, but it falls apart when you think about it just a little bit harder. When you say that a deity "used evolution" you must mean that a deity performed some action (i.e. set up some intial conditions, or moved some atoms around), and the result was something different than what would have been the case had the deity not performed that action. Otherwise you are saying that the deity's existence makes no difference at all to the universe. In the end, you are postulating something just as miraculous as a 7-day creation, albeit more subtle.