Honestly, sounds like that was the result of poor form, not because of what was being chopped. There's a video on Youtube of a 12" AK being used to chop through a 2" thick slab of concrete. No chips, just a slight tear at some point from poor form and hitting the concrete where the edge is a little softer.
Here it is.
http://www.youtube.com/watch?v=ChlY1GqRE78
Things like bricks are less forgiving of form, but whacking a piece of wood can also bend or tear a blade if your form is bad.
Not that I
advocate chopping bricks or anything like that, it's still a really bad idea. It just can be done without edge damage if you know what you're doing. I have split concrete blocks with a cheap axe before, while removing the posts for an old chain link fence. The axe didn't suffer anything that didn't file out in about 5 minutes.
About the only "test" that an HI blade will do terrible at is the ridiculous vise bending "test." Which is absolutely idiotic. Any historical blade will also bend and take a set if you did that (and the high-quality katanas that are actually meant for cutting things are also actually known--among those who actually use them instead of the 13-year-old fanboy market--for bending and taking a set if your form is off). Working and combat blades were tempered stiff, so they wouldn't flex or vibrate while hitting things. But then at some point, some enterprising, dishonest businessman decided that being able to bend the blade and have it return true is a good thing, thus modern sword repros tend to be flexible and whippy, more like a tape measure than a sword, and totally unsuitable for hard use.