Very true. And not all PEX is equal. Apparently any PEX manufacturing process that uses T-butyl peroxide (breaks down T-butanol and methyl-tert-butyl ether) has been known to contaminate water in homes. These components are also found in gasoline, apparently. Not something you want to imbibe.

As near as I can tell, there was not a recommendation to remove this type of piping. Rather, they recommend that people simply flush their lines (run the water for a bit) before using.