Actually when you think about it, if the stones were the crystalization of Olive-Oil and Epsom Salts then there would be the about same amount every time.
But I've done two flushes so far and the 1st one I passed about 50, but in the 2nd one there were around 300.
Also, there are people who do the flushes and don't get any stones at all. So even if a doctor says they aren't Gall stones he can't say that they are just the olive oil and Epsom salt.