The 1.7% number is tainted. Jobs said that the data came 3 days ago. That's only about 2.5 weeks into the return window iPhone 4 for the earliest of recipients. Many people were also waiting until the press conference to make a decision and people will usually return something at the end of a window (i.e. close to 30 days), not at the beginning. Also, iPhone 4 was compared to the 3GS, which as been around for over a year. The mere difference in ranges alone invalidates the comparison, while the small time sample on the iPhone 4 invalidates the 1.7 figure. So basically, the number reported is meaningless. I guarantee that tonight the number is already higher than 1.7 and that it will rise above that mark over the lifespan of the iPhone 4.