This is 100% true. I can attest to this. As someone who meditates every day for multiple hours and is still just beginning to learn, I can more easily drop into Beta Delta and Theta brain wave patterns when high. I can do it without weed, too; it just takes longer, and I can withstand fewer distractions. In this case, weed is such a great tool. I feel it also helps facilitate certain "experiences" I just can't explain here on this forum.