I base it off of my personal experience, not so much concepts to back them up. I figured people would question my zelda vs marth opinion before anything else.
as for falco, the only falco I've lost to in a long time was mango's, and both matches were on falco stages. Generally, my strategy vs falco is to powershield camp lasers to force approaches. This is, with practice, surprisingly reliable. My hardest falco playing opponents are also the ones that shoot the least.
wool, I'll be going to falls church virginia saturday night. if you wish, you can play my zelda on sunday or monday and come to your own conclusions based on those matches.