JB's assessment of how monos work in regards to the damage done vs. traditional cup and core bullets is spot on.
If you think a barnes TSX or TTSX reduces lungs to red soup I question your definition of red soup.
I might also add that I use monos exclusively now and have been for several years due to the lead issue. However, I am under no illusion that they killas quickly as lead and copper bullets because they dont. The very nature of there design hampers massive damage, which a large factor in how fast an animal expires.