Good points. Harvard's endowment fund invests in hedge funds that use quant systems.
Of course, that Harvard econ grad I mentioned earlier also made a point to illustrate that while he believes these systems can work for some time, the meltdown of the Goldman Alpha fund shows that it's fools work.
It's practically like talking religion, so you can't get anywhere with these folks.
On probably 5 occasions over the years I've shown this person how bubbles re-trace in a bell curve, and it's all just dismissed. The latest example was with Nickel this spring. Look at a chart of Nickel now. You'll see a, well, you know what it will look like.