Originally Posted by Bud Cline
Raw samples being dinked around with are ten times more vulnerable to damage than tiles that are properly installed.
Think about it.
When we bought our house the original owners were nice enough to leave the extra tiles in the garage. The ones that had been installed in the bathrooms since the 70's were fine. The one I tossed in my trunk to match - broke. What Bud said.
I would be much more concerned about your "bounce". If you have issues down the road it will be much more likely because deflection than the tile itself.