This is very cool :) By default, if the search string consists of more than 1 word do you do an OR or AND search? It seems OR from the results I'm getting, but

This is very cool :) By default, if the search string consists of more than 1 word do you do an OR or AND search? It seems OR from the results I'm getting, but most people now are conditioned by Google to expect an AND search (which really makes more sense..) Great work, either way.