I don't meant to shoot the messenger and this isn't directed at you, but this behavior makes no sense and is not intuitive to anyone who's ever listened to music on a CD (which is still A LOT of people).
I couldn't care less about scrubbing; I'd do that with the little progress bar because it's quicker and more precise than guessing how long to hold a button. I really just hate that one arrogant (or ignorant) person/group decided to change the meaning of a well-understood symbol as if they were the decider for everyone else.
However, as a user, I was just trained to recognize the 'Seek' button as 'Next' or 'Previous' track.
So there are conflicting messages in their design. Why would I want to hold down the 'Next Track' button to seek ahead in the song? I would never think to do that.
To which I would reply "My stereo does not have a fast-forward symbol on that button."