Hi Cheech,
Where did you find this information? It sounds fairly wrong, if it really had 25%dmt people would be working with this root, even if it may be difficult to extract it (imagine, if you could do a fairly crappy inefficient extraction getting 10% of the total alkaloids, still your yield would be fairly high).
In practice, mpeople report aounts varying from 0% to 0.3% and yes, people have tried to extract it with unimpressive results. SWIM has never tried this though because it is illegal!