WRONG: NPD measures MORE than in-store sales
You obviously have never purchased and used NPD's data. NPD
*does* have data for online sales (from sites from amazon.com,
buy.com), mail order catalogs (like PC Connection, PC Mall - and
their online sites), and direct sales (from software vendors like
Symantec). In addition, they also have data from distributors
(such as Ingram Micro), and VARs (like software spectrum). And
far from ignoring Dell, they have a large consumer panel that
contains estimates for how much software people buy from Dell.
All of their data sources are listed on their website. While they
don't have w.w. estimates like IDC and Dataquest, NPD's data is
really the only way a software vendor can figure out how their
product is doing in the U.S. market.
January 24, 2006