It's pretty easy to put your DRL's on a switch so you have control of it. I've done so, not so much to save fuel but to save the bulb life of them.
So I leave the switch on when it's raining (because they are good for that and it's convenient to have them come on automatically) and I shut them off when it's sunny. DRL's are not essential when the sun is shining.
My car, my choice.
