The weak sales of the Nexus One can also be attributed to the success of previous Android handsets. While Google may not have put any effort into marketing the Nexus One, Verizon launched an all-out marketing offensive to promote the Motorola Droid prior to its launch. That was only a couple months ago.
The Droid sold more than 12 times the Nexus One in its first week as a result. The fallout of that for the Nexus One, though, is that a quarter million users, who may have been a prime market for the Nexus One, just bought cutting edge Android-based handsets with Verizon. The Droid will get the Android 2.1 update in the near future, so there is little to compel any of them to drop the Droid in favor of the Nexus One.