Not only is the press biased, but so too are some companies that do tracking of statistics (especially in the computer market).
When you compound their errors on top of the presses spinning those errors, things get way out of hand - and the truth is no longer recognizable.
The SPA (Software Publishers Association) tracks Software sales. But they do a really poor job of it. They generally ask members (stores and software companies) to submit results based on what they estimate their sales are like for the previous quarter (or year) and then take those predictions and estimate total sales. Anyone who knows anything about studies should see a few holes -
Then there is creative accounting -
On September 11, 1995, http://www.spa.org/research/95q2noam.htm, the SPA announced that for the first half of 1995, Macintosh software sales in North America were $473.2 million, down 4.1% from the same period in 1994.
So going from $473 million in '95 to $604 million in '96 is down 12.5%? I do not know how they do math, but I get about 28% growth!
The SPA explained this (only after they received lots of complaints). It turns out that they were revising the previous years numbers (based on unreported sales, etc.) all during the year - and comparing the previous years "revised" numbers to next years reported numbers. But if one were to assume that this years projections were off by as much as the last years - then sales were still way up. Also at no time did SPA have a press release announcing the real numbers for the previous year and stating that they had miss estimated those numbers (which were also up over the previous year - despite the report to the contrary).
It seems that the SPA gets quoted far more often when they have doom and gloom reports about Apple - and so they cater to that, and make little attempt to be objective or accurate - especially when inaccurate gets more attention.
I will add to this section as time goes on. But for now it is quite obvious that spin effects things. It is not only the press that is spinning things either. Companies make nice with MS and Intel because they see a cut in it for themselves - of some sort or another. If the truth is likely to upset their readers or advertisers, then the truth becomes unimportant, or creatively interpreted. Well what else is new? We just have to smarter than they are, are keep our critical skepticism in place.