This is going to sound pretty arrogant. I don't mean to be confrontational, but some plain speaking is warranted here, so here goes:
The article describes what happens if you have not learned poncho techniques and if you have not discovered the advantages of the cape - and I'm not talking about the Gatewood cape, though it seems to be a fine piece of gear. I mean a simple rectangle 8x5 that forms the "hood" on a long hem. First, the differences between the poncho and the cape that eliminate or reduce some of the disadvantages of the poncho.
poncho, leaky hood - cape, no hood to leak
poncho, distorted structure due to hood or collar hole - cape, no hole, no distortion.
poncho, flaps in wind, may not cover arms - cape, cone shape reduces flapping and maintains coverage in wind, arms have more coverage. Both poncho and cape should be used with thumb or finger loops to keep the arms covered - especially when using poles.
poncho, hides the feet - cape, hides them a good bit less
The disadvantages of both capes and tarps are largely a matter of not outfitting them correctly or not using them properly. For example:
Flapping and poor foot visibility? Both problems are largely addressed with a waist strap.
Arms get wet? Add thumb loops to the hems to keep the fabric over the arms.
Having to attach and remove guy lines? Pockets that are also reinforcements can hold the lines and provide a little weight on the corners to reduce flapping. They keep the lines instantly available. The rubber band trick mentioned in the article is an invitation to low comedy whenever you go past blueberry bushes, gorse or any other brush.
Small size compared to most tarps means less weather resistance? Not if you use a half-pyramid or leanto setup. The half pyramid will handle serious wind and is roomy, and the leanto is not too shabby. You can't get decent coverage with a cape or poncho in an A-frame unless it is over a hammock, so why try?
Leg coverage? Why diss a poncho or cape for poor leg coverage? Does a rain jacket keep legs dry? So wear rain pants or chaps with the poncho.
Poorer upper body ventillation than highly breathable rain jackets? Granted. But while that highly breathable jacket is breathing, water is pooling under the straps, back and hip belt, stopping ventillation and producing enough hydrolic head to leak into the jacket. And all that padding is getting wet and water is being forced through the back of the pack, increasing your weight as well as the "yuck" factor in days to come. With a poncho/cape, full coverage of the pack and torso means you will stay drier in *some* and perhaps *more* conditions than you can with a conventional W/B jacket. Your pack will certainly stay drier than it ever will with a pack cover. When rain is constant over days, I stay drier with a poncho/cape - and converted on the AT in '03 when the rain kept coming. When rain is of short duration, under an hour, I also stay drier. A jacket is definitely superior when the rain is intermittent and I'm going past dripping brush. Then, I rely on a very lightweight, W/B jacket that would not work as my only rain gear. Which leads to another matter:
An SUL, W/B jacket such as Sportshell (3 oz) can keep you reasonably dry while setting up or running errands around camp. It will serve as a wind shirt - which you need anyway and will fend off drips from wet brush along the trail. For heavy duty (long trails), I use a Durafab jacket (7 oz) for the same purpose.
A poncho/cape will not eliminate the need for chaps or rain pants. It will not substitute for a wind shirt. There is no weight saving to be had there. The poncho/cape will substitute for a heavier (than the windshirt) and more expensive W/B rain jacket and it will do a better job of keeping you and your plunder dry. As a tarp, it has limitations, but used properly, it will keep you at least as dry as a larger, shaped conventional catenary tarp in an A-frams set up.