It's pretty sensible advice really (don't make simplistic extrapolations from reports of probably inaccurate estimates of order changes in an incredibly complex supply chain).

Seriously, journalists and analysts have been jumping on these kind of reports for years, claiming that they prove Apple is "losing their lustre" in whatever market, and most of the time Apple have reported record profits for that quarter... Traders seem to be taken in by them hook, line and sinker but I'd take it with a grain of salt...