I had a bright hazard yellow Subaru with daytime running lights and was shocked every-time someone failed to see it which was shockingly often. I'm not going to say it was an every day occurrence, but certainly once a week. Strangely, I've had far fewer incidents of people not seeing me in my silver Mercedes roadster without daytime running lights although I purposely drive it like a mad-man and hence developed my own rule for driving a sports car or motorcycle:

Accelerating at high speed, decelerating quickly, darting in and out of lanes of traffic, drifting corners, staying on the accelerator to produce lots of noise, swerving back and forth in the lane to "warm the tires" may make you look like an ass, but it also keeps you safe because people track the "idiot."