I went back and re-read the blog post, and I can sort of see how I might have been misinterpreting it a little. But I still dislike "toughness," and I think using that term invites the sort of misinterpretation that we're seeing here. Here's why.
I have met quite a few folks in business who seem to think... well... they would never use this term or say it like this, but they basically think that it takes a sociopath or someone with narcissistic personality disorder to start a successful business.
I've seen several examples of this in action... of people who put up with or even fund downright abusive off-the-charts-narcissistic personalities because they were convinced that those are the sorts of people who will be successful.
The thing is: this doesn't match what I've seen in terms of actual success. Granted, I don't have 300 examples. I have about five. But what I've seen is that success is determined by good market research, good analytics, iteration, perseverance, intelligence, and a bit of luck. There are lots of factors, but those seem to be the big ones.
In the narcissistic world of startups, the term "toughness" is going to bring to mind narcissism and sociopathic behavior. There are just too many bad examples. Use another word, like "perseverance" or "resourcefulness" and your point will be better taken.
