Actually using the criteria for potency .. getting an erection with pill help or without pill help levels the playing field so to speak. There is no doubt that a younger man (40s-50s) with no prior ED has the edge, as he should. I am sure statistics will bear that out. It appears then that the 26% rate is accurate.
I am older, but never had an erectile failure before surgery. Post surgery I am batting 000% with or without pills. However my surgeon lists me as a success because I get 100% success with injections. Using those figures I am part of the 74% failures. The problem is getting everyone to use the same definition.
PSA July 2006 4.7 , Nodule found
biopsy 10/06 very agressive gleason4+4=8 identified
DaVinci surgery, January 2007
Post Ob confirms, gleason 4+4=8 with no extension or invasion
no long term continence problems
post surgery PSA continues to be undetectable at 4 years
ED problems continue, using bimix