Really? Maybe I'm just an optimist, but it sounded more like "Every product has its bugs, and there's no point in pointing fingers here when it's not the point of this blog post."
I'm sure that Riak has bugs too - there are very few software products that DON'T (the provably-correct C compiler CompCert[1] being one that shouldn't). But it seemed to me that the post's author was simply trying to avoid getting sidetracked.