Mine started at 600 miles, so don't bet your farm that WRX v.2 won't have the problem!
One interesting point that I think I mentioned in another thread: I had a British guy riding in my car recently. He owns a '94 WRX (imported from Japan), and I'm sure he knows plenty of people owning WRXes for much longer than it has been sold here. He said that he has never heard a noise like this one, and didn't remember anything like it being mentioned on scoobynet. This indicates that the problem is specific to the cars produced for the US.