That article contains at least one link directly to a gov't study. Following the other links will open a Pandora's box of varying opinions from armchair 'experts,' to electrical engineers relaying theory, to actual real world reports from people who study thus stuff first hand. Some trying to create weapons, others creating shields.
Also, if we're going to debate EMP's effects on electronics, can we all be on the same page here. Take a few and read up. EMP, is a broader subject than many people realize. Heres a wiki article. Feel free to follow source links if you don't trust wiki itself. http://en.m.wikipedia.org/wiki/Electromagnetic_pulse
There's nothing wrong with preparing to be next to the source, but an EMP DOES NOT automatically equate to instant colonial era technology. The intensity of the wave that hits your electronics is what matters. A weak pulse from the back of a van in a parking garage 10 miles away probably won't toast your car. An advanced weaponized EMP propogating from 40,000ft could probably knock out a significant area. But the farther that wave travels, the weaker it becomes. Eventually it will be so weak it won't even light up a flashlight bulb.
Without actually testing your electronics to failure, us ordinary folks have no way of knowing the limits of any of our electronics circuits. Call up any electronics company and ask them what field strength the device in question can handle.