RCYH

I went to the dealership yesterday and test-drove an rx350, the overall feeling was very good! The only thing I notice was when I drove it over around 50-55mph, there seems some wind/air (noise) coming into the car. I tried to turned off all fans, and the noise became more noticeable. I would say if I turn the radio loud enough, that sound can be covered. The sales was blaming on the hood deflector but I really doubt it since the noise was not coming from the front. Does anyone experience that?