That's what I took from it. Forbes is aimed at the people buying solutions so from the perspective of a CIO or CTO (or even the people they're supporting with

That's what I took from it. Forbes is aimed at the people buying solutions so from the perspective of a CIO or CTO (or even the people they're supporting with their analysis systems), the article is telling them that they may not be getting what they think they paid for. This is about industry trends, and you CAN get a representative sample in reasonable time, for some definition of reasonable. The takeaway from this article is that what someone in the data space may think is reasonable isn't what someone who just paid for an army of data scientists and a data lake solution because those things are sexy thinks is reasonable.