"QUESTION FOR THE IBKR LONGS: Would you buy a car that drove slower than all of the other cars on the road? Some of you would, actually, as you are indeed holding IBKR. "
Your example is imperfect. The hare was beating the tortoise for a while...but then the tables turned. Temporary underperformance (or 'volatility') is not a consideration for an investor. It means absolutely NOTHING. In fact, one must temporarily underperform in order to do better than average (which is the S&P500).