My answer would be no....they are not easy to break.
Been shooting them exclusively since before Trad Gang....I've broke maybe a half dozen stump shooting in the 7 years I've been shooting them and I stump shoot a pretty good bit when I'm out hunting.
Rocks and glancing blows got them all, but not foam 3-D targets, but hard stumps, trees, and rocks. And they didn't all break in the same place....mostly up front on rocks, and more reaward on the glancing blows. Most of those that broke had already been shot a lot with a judo as well.
Far as I can tell they are tuff as nails. I don't ever see myself switching to another arrow for the hunting I do. I got a stock pile of em.