Yes he is mostly correct. I say it here all the time and it is posted on one of the hair testing company websites that if you get high 3 times in the last 90 days, then you can test positive. I have actually refined my answer over the last few months to these types of questions as I now say that if you have 90 days of growth or 1 and 1/2 inches of hair and you get high 3 times then you can test positive or are in danger of failing, instead of saying that if you get high 3 in the last 90 days then you can test positive. I say it like that now just in case someone smokes 3 times and only has 1/2 of hair. I don't know though if consecutive makes a difference. I would think that if anything 3 consecutive times would be an advantage over 3 spread out over the 90 days because of how half-life works.