I pulled a rear shock yesterday these are much better than anything Ford has used before and I have pulled the rear shocks off a 2010 and a 2011 with Brembo package. These have significant rebound damping. A friend who happens to be a certified Ohlins tech was with me and I trust his judgment having rebuilt and tested hundreds of shocks from all the major manufacturers and he said the same thing never has he seen rebound damping like this on a Ford. I think Ford has learned some real lessons and has applied them to the PP package. Now will they last? Only time will tell.
2010 GTRR in 5.0 Magazine [http://www.mustangandfords.com/featured-vehicles/m5lp-1212-2010-ford-mustang-gt-rr-total-fabrication/viewall.html]
2015 White SC, PP, etc....