Not too sure. It might more 50/50 in that particular case.
You can't yield to cars you can't see.
Scenario: What if this was at night and the Lambo didn't have it's headlights on? The lambo would still have the right of way, but could you fault the Mazda? No.
Lambo is flat black on a cloudy British day, lower profile than most cars around it, and it sounded (to me) like it was speeding.
Your argument is speed of the Lambo doesn't matter. Well it does, if it was going 100mph, it would be totally at fault.