you can't really compare sales of the n900 to the iphone. Apple have but a single mobile device and it's heavily subsidized. With just one mobile device, they are able to focus more attention on it. Nokia make thousands of different phone and are constantly testing different types of phone. It is a double-edge sword for big companies like Nokia because they made phones for various level of users and thus they must divide their research into all of them.

And 100k within 5 weeks does make more sense.