So, Taleb has looked at the math and says it's good. They haven't looked at the math at all, or if they have, they've made no effort to refute it. If the conclusions are supported by the math (presumably they are, otherwise what's the point of writing the paper?) then to say "no we don't agree with the conclusion" without making any attempt to understand the way that the authors got to the conclusion is pretty freakin' suspect to use a colloquialism.