Always an interesting subject. I can't help but feel it would reach a much wider audience and achieve a greater impact if it was subjected to an automated grammar check, or edited by a native English speaker. I could not get through all of the distracting grammar errors, and I suspect most non-technical English speaking managers (who seem to be the intended audience?) would have the same reaction.
As a native English speaker and someone who prides themselves on their ability to clearly convey complex ideas through prose, I don't recall a point where a grammatical error detracted from my understanding.
