The Gartner report you mention sells for US$9995, and is a PDF document 16 pages long (no doubt includes a cover page, a title page, a couple of pages of Index, a Bibliography page, and an almost blank back page detailing copyright information and Library of Congress number!) which might have 10 pages of information, double or triple spaced no doubt.
I wonder how many dollars a word that represents?
I believe they are helping keep the secret of GNU/Linux success on those shipped PCs... ;-)