They have been "tweaking" the poly now for going on two years. If it takes nearly two years to solve a problem -- that's more than "tweaking".
Here are the lies as spelled out by Martin Collins -- the "low kickback" and "dustfree" are particularly interesting:
http://www.polytrack.com/advantages.html
They don't "harrow" it -- but they do use machinery on it routinely throughout a card to treat it. Machinery made by Cousins.
Can you imagine using that garbage "indoors"? Better bring the SCUBA gear so you can breath. Unbelievable.