Today on my way to work I had the radio off, and when shifting one gear down to speed up on the highway, I thought to hear the turbo. It was not a real whistle (like what I hear in our Audi TT), but it did sound like a spool until the next gear kicked in. This happened about 3 times. I have not heard this before, so I am curious if anyone has heard this as well on a 2.0