You can't argue "You are wrong." with only an anecdote :P. Also, I don't think your company is still a start-up after 5 years... The author's point is precisely

You can't argue "You are wrong." with only an anecdote :P. Also, I don't think your company is still a start-up after 5 years... The author's point is precisely "When you are starting up," not 5 years down the road.