I've tended to be unconvinced that product placement really making a difference when it comes to choosing a brand. That said, I must confess though that this photo and the memories of Nigel Mansell driving the Canon F1 Williams to his F1 title did influence my choice of Canon over Nikon.
At the time, I was looking to buy my first film SLR and wanted a basic kit comprising a couple of telephoto lenses and a camera body for a beginner. There was nothing really in it re spec or price between these two manufacturers so it was the brand that won it.
The rest, as they say is history... I've never considered moving away from Canon (my first digital was the Canon 300D) and definitely recommend them. In truth, though... if you had chosen Nikon... you would be saying exactly the same.